Google shopping ads: A guide for Irish ecommerce businesses

Google shopping ads allow ecommerce businesses to show individual products to people who are actively searching on Google. 

Instead of displaying only text, these ads can include a product image, title, price, shop name and other details. This allows potential customers to compare products before they visit your website.

For an Irish ecommerce business, Google shopping ads can provide direct access to people searching for specific products, brands, sizes, colours and price ranges.

However, campaign performance depends on much more than setting a budget. Your Google Merchant Center product data, campaign structure, bidding, conversion tracking, product pages, prices and delivery information must all work together.

This guide explains how Google shopping ads work and how small ecommerce businesses in Ireland can improve visibility, control wasted spend and generate more profitable sales.

Google shopping ads are product-based advertisements created from information submitted to Google Merchant Center. Unlike standard Search campaigns, they use product attributes rather than advertiser-selected keywords to match products with relevant searches.

Key takeaways

• Google shopping ads use product data from Google Merchant Center rather than conventional keyword targeting.

• The quality and accuracy of your product data affect where and when your products can appear.

• Product titles should clearly describe what the item is, including relevant attributes such as brand, product type, colour, size or material.

• Prices, availability, delivery information and product-page content must remain consistent with the information submitted to Google.

• Performance Max and Standard Shopping campaigns can both be used to promote Merchant Center products.

• Products should be grouped according to commercial value, margin, seasonality and performance rather than placed in one undifferentiated campaign.

• Conversion tracking should record accurate purchase values, not simply the number of transactions.

• Free product listings can provide additional visibility alongside paid Google shopping ads.

• Irish merchants participate through a Comparison Shopping Service, which can include Google Shopping itself.

• Campaign success should be judged by profitable revenue and return on ad spend, not clicks alone.

What are Google shopping ads?

Google shopping ads are paid product advertisements that can appear across eligible Google surfaces.

They commonly display:

• A product image

• Product title

• Price

• Shop or business name

• Ratings, where eligible

• Delivery information

• Promotional information

• Availability or local stock information in supported formats

The ads are generated from product information submitted to Google Merchant Center.

You do not write a separate traditional text ad for every product. Google uses the product data and campaign settings to create ads and decide when a product is relevant to a search.

How do Google shopping ads work?

Google shopping ads connect three main elements:

1. Your ecommerce website

2. Google Merchant Center

3. Google Ads

Your website contains the product pages, prices, stock information and checkout process.

Google Merchant Center receives structured information about the products you sell. This information may be supplied through an ecommerce platform integration, product file, API, website crawl or another data source.

Google Ads uses that Merchant Center product data within Standard Shopping or Performance Max campaigns.

When someone searches for a relevant product, Google evaluates your product attributes, campaign settings, bid, expected performance, landing page and search context to decide whether the product is eligible to appear.

Unlike a conventional Search campaign, Shopping campaigns do not rely primarily on a list of positive keywords chosen by the advertiser. Google matches products using attributes such as the title, description, category, brand, condition, price and availability.

What information does a Google shopping ad use?

Missing or inaccurate information can limit visibility, cause product disapprovals or prevent an item from appearing altogether.

Merchant Center can also disapprove products when the submitted price or availability does not match the product landing page.

Google shopping ads and free product listings

Google shopping ads are paid placements managed through Google Ads.

Free product listings allow eligible products to appear across Google without an advertising charge. Depending on eligibility and location, these listings can appear on Google Search, the Shopping tab, Google Images and other supported Google surfaces.

Both paid ads and free listings use product information from Merchant Center.

Free listings should not replace a paid campaign strategy, but they can provide additional product visibility and help retailers identify products that attract engagement organically.

What is a Comparison Shopping Service?

Businesses advertising products in Ireland must participate through a Comparison Shopping Service, commonly referred to as a CSS.

A CSS submits product offers and can place Shopping ads or free product listings on behalf of merchants. Google Shopping is itself an available CSS, so many businesses already participate through Google Shopping without needing to appoint a separate provider.

Merchants can also choose another CSS or work with more than one.

Third-party CSS providers use different pricing and management models. Some only provide access to the programme, while others manage product data or campaigns.

Do not switch providers based only on a claimed bidding discount. Consider:

• Management fees

• Campaign ownership

• Merchant Center ownership

• Reporting access

• Contract terms

• Technical support

• The provider’s involvement in campaign management

The CSS arrangement does not compensate for poor product data, weak tracking or an unprofitable campaign structure.

Standard Shopping or Performance Max?

Google shopping ads can be managed through Standard Shopping campaigns or Performance Max campaigns connected to Merchant Center.

Standard Shopping campaigns

Standard Shopping campaigns focus on product advertising and provide a direct campaign structure based on product groups.

They can be useful when you need:

• A simpler product-led campaign structure

• Greater visibility over how products are divided

• Direct control over campaign priorities

• A controlled testing environment

• Clearer separation between product groups

• A comparison point before moving products into Performance Max

Performance Max campaigns

Performance Max can use your Merchant Center products alongside text, image and video assets across Google inventory, including Search, Shopping, YouTube, Display, Discover, Gmail and Maps.

It can be useful when:

• Purchase tracking is accurate

• Transaction values are recorded correctly

• The campaign has enough budget and data

• You want to reach customers across several Google channels

• You can provide strong creative assets

• Products are grouped into relevant asset groups and listing groups

• You are comfortable using automated bidding

Performance Max is not automatically the best choice for every ecommerce business.

Automation cannot correct:

• Incorrect product prices

• Poor product titles

• Missing identifiers

• Weak product images

• Uncompetitive delivery charges

• Low-margin products

• Broken purchase tracking

• A website that does not convert

Where sufficient traffic and conversion volume exist, test the available campaign formats rather than assuming one will always perform better.

What I commonly see in Irish ecommerce campaigns

One of the most common problems I see is an entire product catalogue placed into one campaign with one budget and one return-on-ad-spend target.

This gives Google no clear commercial distinction between:

• High-margin and low-margin products

• Bestsellers and products with little demand

• Seasonal products and year-round products

• Products with strong stock availability and items close to selling out

• Core product ranges and clearance stock

A product generating €100 in revenue with a strong margin is not commercially equal to another product generating the same revenue with a much lower margin.

I also regularly see product titles copied directly from internal stock-management systems. These titles may make sense to the business but fail to describe the product clearly to a potential customer.

Another recurring problem is inaccurate purchase tracking. Revenue may be duplicated, delivery charges may be omitted, test purchases may remain in the data, or every transaction may be assigned the same value.

These issues give automated bidding the wrong information and can make an apparently successful campaign unprofitable.

Why the product feed matters

Your product data source is the foundation of Google shopping ads.

Google uses this information to understand what you sell, create the ad and match products with relevant searches.

The objective is not to add as many keywords as possible to every field. The objective is to provide complete, accurate and commercially useful product information.

An effective product data source should:

• Describe each product clearly

• Distinguish between variants

• Match the corresponding product page

• Use accurate prices and availability

• Include valid product identifiers

• Use suitable images

• Contain correct delivery and return information

• Update whenever product information changes

Product data errors can result in warnings, limited performance or disapprovals. Disapproved products cannot appear in Shopping ads or free listings until the problem is resolved.

How to optimise product titles

The product title is one of the clearest signals available to Google and potential customers.

A good title should identify the product and include the attributes that help distinguish it.

Depending on the product, this may include:

• Brand

• Product type

• Model

• Gender

• Colour

• Size

• Material

• Quantity

• Capacity

• Compatibility

• Intended use

For example:

Weak title:
Classic chair

Stronger title:
Churchill Stonecast Duck Egg Coupe Plate 28.8 cm

Another example:

Weak title:
Blue runners

Stronger title:
Nike Pegasus Men’s Running Shoes, Blue, Size 10

The most important information should appear early because titles may be shortened in some placements.

Do not add promotional phrases such as “Free delivery”, “Lowest price” or “Best seller” to the product title.

The submitted title should accurately describe the item and match the corresponding product page. Product variants should include distinguishing information such as colour or size.

How to improve product descriptions

Descriptions should provide useful information that is not clear from the title alone.

Include relevant details such as:

• Key features

• Materials

• Dimensions

• Technical specifications

• Compatibility

• Intended user

• Product benefits

• Care instructions

• Pack quantities

• Relevant product applications

Avoid copying generic manufacturer wording used by hundreds of other retailers when better original information is available.

Do not fill the description with unrelated keywords, sales claims or repeated phrases. The text should accurately describe the product and support both Google’s understanding and the customer’s purchase decision.

Use accurate product identifiers

Product identifiers help Google understand exactly which item you are selling.

Depending on the product, these can include:

• GTIN

• EAN

• UPC

• ISBN

• Brand

• Manufacturer Part Number

In Europe, many retail products use an EAN, which is a form of GTIN.

Do not invent a GTIN or submit an internal stock code in its place. New products with manufacturer-assigned identifiers should use the correct identifier and brand information.

Products without manufacturer-assigned identifiers require a different setup. This can apply to custom, handmade or private-label products.

Use strong product images

The main image is often the first element a shopper notices.

Use a clear, high-resolution image that:

• Shows the correct product

• Matches the selected variant

• Uses a clean background where appropriate

• Does not contain misleading elements

• Is not a thumbnail

• Can be accessed and crawled by Google

• Does not include promotional text or watermarks

• Represents the product accurately

Additional product images can show:

• Different angles

• Product details

• Scale

• Packaging

• The item in use

• Lifestyle settings

• Relevant product features

Keep prices and availability synchronised

The price and availability in Merchant Center must match the information on the product page.

Problems often arise when:

• A sale ends on the website but remains in the feed

• A product goes out of stock but still appears as available

• Variant prices are submitted incorrectly

• VAT treatment differs between the feed and website

• Currency settings are inconsistent

• Updates are sent too infrequently

Google may disapprove products where it identifies a mismatch between the product data and landing page.

Use automatic updates as a safeguard where appropriate, but do not rely on them as a replacement for an accurate product integration.

Include delivery and return information

Irish customers need to understand:

• Whether delivery is available to their location

• How much delivery costs

• The free-delivery threshold

• Expected delivery times

• Whether collection is available

• How returns work

• Who pays return costs

Unexpected delivery charges can reduce the conversion rate even when the advertisement generates relevant traffic.

Your Merchant Center settings, product feed and website should communicate consistent delivery and return information.

Organise products with custom labels

Custom labels allow you to organise products according to internal commercial criteria that customers do not see.

Useful custom labels could include:

• High margin

• Low margin

• Bestseller

• New product

• Clearance

• Seasonal

• Full price

• Sale

• Price band

• Strong stock

• Limited stock

• Priority brand

For example:

Use labels that support commercial decisions. Do not create an elaborate system that nobody maintains.

Segment campaigns according to commercial priorities

Do not automatically advertise every product in the same campaign.

Consider separating products based on:

• Product category

• Brand

• Margin

• Average selling price

• Seasonality

• Historical performance

• Stock availability

• New versus existing products

• Customer value

• Delivery restrictions

• Business priority

A small catalogue may only need one or two campaigns.

A large retailer may need separate campaigns for major categories, countries, margins or strategic product ranges.

The structure should reflect how the business makes money, not just how the website menu is organised.

For example, an Irish furniture retailer may separate:

• High-margin dining furniture

• Lower-margin home accessories

• Clearance stock

• Products available for nationwide delivery

• Products restricted to local delivery

This allows budgets and return targets to reflect the actual commercial value of each range.

Use bidding strategies based on reliable data

Ecommerce campaigns should record the value of each purchase.

This allows Google Ads to distinguish between a €20 transaction and a €500 transaction.

Value-based bidding can then optimise towards total conversion value or a target return on ad spend.

Maximise conversion value

This strategy aims to generate as much conversion value as possible within the available budget.

It can be appropriate when:

• Purchase values are accurate

• The priority is revenue growth

• There is no fixed return target yet

• The campaign has enough data to support automation

Target ROAS

Target ROAS aims to generate conversion value while working towards a defined return on ad spend.

A target set too aggressively can restrict traffic and sales. A target that is too low may generate more revenue but fail to protect profitability.

Do not select a target based on a generic industry recommendation.

Your required ROAS should account for:

• Gross margin

• Delivery costs

• Payment fees

• Discounts

• Returns

• Agency or management costs

• Repeat-purchase value

• Business overheads

• The proportion of new and existing customers

Revenue is not the same as profit.

Set up accurate ecommerce conversion tracking

Before increasing your Google shopping ads budget, confirm that ecommerce conversion tracking records:

• The transaction once

• The correct order value

• The correct currency

• A unique transaction ID

• Completed purchases only

• Refunds or conversion adjustments where available

• Consent correctly

• Test transactions separately from genuine orders

Check whether the reported conversion value includes:

• VAT

• Delivery

• Discounts

• Gift cards

• Refunds

The correct configuration depends on how the business evaluates revenue and profitability, but it must remain consistent.

Provide Performance Max with suitable assets

Performance Max can use more than the Merchant Center product feed.

Depending on the campaign setup, provide:

• Business logos

• Square and landscape images

• Lifestyle product photography

• Short headlines

• Longer headlines

• Descriptions

• Video assets

• Relevant destination URLs

Group assets around a coherent product range or audience.

Do not place premium outdoor furniture, low-cost kitchen accessories and Christmas decorations into one asset group merely because they belong to the same ecommerce website.

Each asset group should support the products contained in its listing group.

Google may combine assets from the same group to create advertisements across several channels, so every combination should make sense.

Be careful with AI-generated product content

AI tools can help produce product titles, descriptions and creative variations, but the output still requires human review.

Check that AI-generated content:

• Describes the correct product

• Does not invent features

• Uses the right brand and model

• Does not confuse variants

• Avoids unsupported claims

• Matches the landing page

• Uses natural language

• Follows Merchant Center requirements

Do not use AI to produce hundreds of near-identical descriptions without checking product accuracy.

Improve the product landing page

The advertisement can generate a click, but the product page must complete the sale.

A strong product page should include:

• The same product and variant shown in the ad

• A clear product title

• Accurate price

• Current availability

• High-quality images

• Product specifications

• Delivery information

• Return information

• Reviews where available

• A visible add-to-cart button

• Secure and usable checkout

• Clear mobile presentation

Avoid sending users to:

• A category page when the ad promotes a specific product

• An unavailable product

• A different variant

• A generic homepage

• A page with a different price

• A slow or broken page

• A product page that redirects unnecessarily

Use promotions strategically

Merchant Center promotions can allow eligible offers to appear with Shopping ads and free listings.

Promotions may include:

• Percentage discounts

• Fixed-amount discounts

• Free gifts

• Multi-buy offers

• Promotional delivery offers

The promotion must be genuine, current and consistent with the website.

Do not run a permanent artificial discount purely to create urgency.

Promotions should support a commercial objective such as:

• Increasing seasonal sales

• Moving excess inventory

• Raising average order value

• Supporting a product launch

• Encouraging new customers

• Competing during a defined sales period

How to measure Google shopping ads performance

Do not judge performance using clicks alone.

For an ecommerce campaign, review:

• Revenue

• Conversion value

• Purchases

• Cost per purchase

• Return on ad spend

• Conversion rate

• Average order value

• Gross margin

• Product-level profitability

• New customer revenue

• Repeat customer revenue

• Refund and return rates

• Impression share

• Product disapprovals

• Budget limitations

Analyse performance at several levels:

• Campaign

• Asset group or ad group

• Product category

• Brand

• Individual product

• Custom label

• Device

• Location

• New versus returning customer

• Paid ads versus free listings

A low cost per click does not mean a campaign is profitable. A more expensive click can still provide better value if it produces higher-value purchases or customers with stronger repeat-purchase potential.

How often should campaigns be reviewed?

Campaigns should be monitored regularly, but not changed simply because performance fluctuates over a few days.

Weekly checks should cover:

• Merchant Center warnings and disapprovals

• Budget usage

• Purchase and revenue tracking

• Products spending without sales

• Stock availability

• Search and category insights

• Major changes in ROAS

• Landing-page problems

• Promotion dates

• Feed update failures

Monthly reviews should examine:

• Product profitability

• Campaign structure

• Custom-label performance

• New versus returning customers

• Category and brand trends

• Seasonal changes

• Budget allocation

• Bidding targets

• Opportunities to expand or reduce coverage

Make controlled changes and record what was changed.

Changing campaign structure, budget, bidding targets, product inclusion and conversion settings at the same time makes it difficult to identify what affected performance.

Common Google shopping ads mistakes

Are Google shopping ads suitable for every ecommerce business?

Google shopping ads work well when people actively search for the products being sold.

They are particularly relevant for:

• Online retailers

• Businesses with clear product prices

• Shops selling recognised brands

• Retailers with searchable product categories

• Ecommerce businesses with competitive delivery options

• Businesses with accurate stock data

• Retailers with sufficient margin to fund paid acquisition

• Businesses selling to customers across Ireland

They may be less suitable when:

• Products cannot be purchased online

• Prices cannot be displayed

• Product demand is very limited

• Margins cannot support advertising costs

• The website provides poor product information

• Delivery costs make the offer uncompetitive

• Stock information is unreliable

• Purchase tracking cannot be implemented accurately

• Products are prohibited or restricted under Google’s policies

A campaign should be assessed against the economics of the business, not simply the availability of the advertising format.

Frequently asked questions about Google shopping ads

What are Google shopping ads?

Google shopping ads are paid product advertisements created using information submitted to Google Merchant Center.

They can display product images, titles, prices, shop details and other information before someone visits the advertiser’s website.

Do Google shopping ads use keywords?

Google shopping ads do not use positive keywords in the same way as standard Search campaigns.

Google primarily uses product attributes, campaign settings and the meaning of a search to decide which products are relevant.

Do I need Google Merchant Center?

Yes. Your product information must be available through Google Merchant Center before it can be promoted through a Standard Shopping or retail-focused Performance Max campaign.

What is the difference between Google shopping ads and Performance Max?

Google shopping ads are an advertising format based on Merchant Center products.

Performance Max is a campaign type that can use those products alongside additional creative assets across several Google channels.

Standard Shopping is another campaign type that can create and manage Google shopping ads.

Are free Google Shopping listings the same as ads?

No.

Free listings can display eligible products without an advertising charge. Google shopping ads are paid through Google Ads.

Both use product information supplied through Merchant Center.

How much do Google shopping ads cost in Ireland?

There is no fixed cost.

The amount depends on:

• Product category

• Competition

• Average cost per click

• Conversion rate

• Product price

• Profit margin

• Campaign structure

• Bidding strategy

• Target locations

• Available budget

The required budget should be calculated from the value of a sale and the number of clicks needed to generate one, not copied from another retailer.

What is a good ROAS for Google shopping ads?

There is no universal target.

The required ROAS depends on your margins, delivery costs, returns, payment fees, overheads and customer lifetime value.

A 400% ROAS may be profitable for one business and unsustainable for another.

Can small businesses use Google shopping ads?

Yes.

Small businesses can use Google shopping ads effectively when they focus on their strongest product ranges, maintain accurate product data and set budgets that reflect realistic click and conversion costs.

A smaller retailer does not need to advertise its entire catalogue.

How long do Google shopping ads take to work?

Products can begin receiving impressions after the Merchant Center setup, product approval and campaign launch are complete.

Reliable optimisation takes longer because the campaign needs enough click, purchase and revenue data to identify useful patterns.

The required time depends on search demand, budget, catalogue size and purchase volume.

Can Google shopping ads help SEO?

Paid Google shopping ads do not directly improve organic search rankings.

However, product search data can reveal useful information about customer demand, popular products and commercially valuable search language.

Free product listings and properly implemented product structured data can also increase the ways eligible products appear across Google, but they remain separate from paid-ad performance.

Get more profitable sales from Google shopping ads

Reach shoppers who are already searching for the products your business sells.

If your Google shopping ads are generating clicks but not enough profitable sales, or if Merchant Center issues are limiting your product visibility, I can help you identify what needs to change.

Book a free consultation and I will review your product data, campaign structure, conversion tracking, bidding and product-page experience. I will identify the biggest opportunities and show you what to prioritise first.

About the author

Alessandro Boscolo Conway — Hello Digital

I'm a Dublin-based freelance SEO and digital marketing consultant with over 20 years of experience, including time on Google Ireland’s Search Quality team.

I run Hello Digital, a consultancy that helps startups and small businesses across Ireland grow online through clear strategy, expert delivery, and practical support.

I've worked with over 50 Irish companies to improve their visibility, generate better leads, and grow sustainably through SEO and digital marketing.

I'm a certified Google Partner and a trusted advisor to e-commerce brands, local services, and fast-growing startups.

• Based in Dublin, 20+ years of experience
• Former Googler, certified Google Partner, SEO strategist, and performance marketer
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