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Comparison Shopping Service

Pay Less Per Click. Sell More.

Adhere CSS is a Google-certified Comparison Shopping Service partner. Ecommerce brands in Ireland and the UK use our CSS platform to run Google Shopping ads at a lower cost-per-click, same placements, same results, less spend.
Save up to 20% on your CPCs | Google-certified CSS partner | Full feed management included

What is a Comparison Shopping Service (CSS)?

A Comparison Shopping Service (CSS) is a Google-approved price comparison platform that aggregates product listings from ecommerce retailers and displays them as Shopping ads on Google Search and Google Shopping.
In the EU and UK, Google is required by law to allow third-party CSS partners to serve Shopping ads alongside its own platform. When you run your Shopping ads through a certified CSS partner like Adhere Digital instead of Google Shopping directly, you unlock a structural CPC discount of up to 20%, with identical ad placements.
When a shopper clicks your CSS-served ad, they land directly on your product page, ready to buy. Nothing changes for the customer. Everything changes for your margin.
How CSS works in plain terms:
https://Comparison%20Shopping%20Service

Key Benefits for Ecommerce Businesses

Lower Cost Per Click

A structural discount of up to 20% on every Shopping click. The saving is automatic once your campaigns run through Adhere CSS, no bidding tricks required.

Enhanced Product Visibility

Your products appear in Google’s Shopping carousel, price comparison surfaces, and image search results, the highest-intent placements in Google’s ecosystem.

Improved Conversion Rates

CSS traffic arrives from price comparison contexts where purchase intent is already high. Shoppers clicking your CSS-served ads have already compared options and chosen you.

Advanced Feed Optimisation

We don’t just submit your feed, we improve it. Automated title rewrites, category mapping, image quality checks, and attribute enrichment all drive better click-through rates from your listings.

Effortless Scaling

Add new products, seasonal lines, or new markets to your feed. Adhere CSS handles categorisation and submission automatically, no additional workload on your side.

Consolidated Reporting

Unified dashboards show CPC savings, click and impression trends, product-level performance, and ROI impact, all in one place, updated continuously.

Why Partner with Adhere Digital for CSS?

We’re not just a CSS reseller. Adhere Digital is a Google Premier Partner performance agency with a dedicated CSS platform and a team that manages Shopping campaigns for ecommerce brands every single day.
01 Google Premier Partner Status
As a Google Premier Partner, Adhere Digital has met Google’s highest standards for performance, spend, and client growth. Your campaigns are managed by a certified team with direct Google support.
Adhere CSS is Adhere Digital’s own Comparison Shopping Service, certified directly with Google. You’re not going through a third-party reseller, your feed connects directly to our platform, which connects directly to Google.
From feed audit and CSS account setup to ongoing bid strategy and monthly reporting, we handle every step. You don’t need a Shopping specialist in-house to make CSS work.
Every month you receive a clear report showing CPC savings, click volume, sales uplift, and ROI. You always know exactly what CSS is delivering for your business.
Our team manages Google Ads, Meta, TikTok, and Paid Social for ecommerce brands across Ireland, the UK, and the US. CSS sits inside a full performance marketing capability, not a standalone product.
We understand the nuances of VAT treatment in product feeds, EU and UK compliance requirements, and the regional shopping behaviour that affects conversion rates in your market.

How We Work

From first conversation to live campaigns, here’s exactly what to expect:
We review your existing Google Merchant Center feed, identify errors, missing attributes, and optimisation opportunities before we do anything else.
We configure and certify your Google Shopping CSS account with all necessary compliance checks, Merchant Center integrations, and feed connections.
Your enriched feed is submitted to the Adhere CSS platform, categorised for relevance, and optimised for click-through rate, titles, images, pricing, and attributes all reviewed.
We launch your Shopping campaigns via Adhere CSS, applying bid strategies that take full advantage of the reduced CPC structure from day one.
Weekly performance reviews drive feed improvements, bid adjustments, and creative tests. CSS is not a set-and-forget channel, we actively manage it to maximise your return.

Frequently Asked Questions About CSS

A Comparison Shopping Service (CSS) is a Google-approved platform that submits product ads to Google Shopping on behalf of ecommerce retailers. In the EU and UK, running Shopping ads through a third-party CSS partner instead of Google Shopping directly gives advertisers a structural discount of up to 20% on cost-per-click, with identical ad placements.
Google provides a rebate to certified CSS partners for each click generated through their platform. Adhere Digital passes this rebate to you as a lower effective CPC, typically around 20% less than running the same campaigns directly through Google Shopping.
No. CSS-served ads appear in exactly the same positions as Google Shopping-served ads, on Google Search, Google Shopping, and Google Images. Shoppers cannot tell the difference. Your ad placements, eligibility, and quality scores are unaffected.
CSS as a structural discount mechanism is specific to the EU and UK due to Google’s regulatory obligations in those markets. However, Adhere Digital works with ecommerce brands in the US on full Google Shopping management and feed optimisation. Contact us to discuss what’s available in your market.
No major changes are required. Adhere Digital handles the CSS account setup and certification. Your existing Google Ads account and Merchant Center connect to our CSS platform, we take care of the technical configuration.
Most brands are live within 3–5 business days of starting the process, depending on the current state of your Merchant Center feed. We begin with a feed audit and work as quickly as possible to get campaigns running.
Adhere CSS is our own certified CSS platform, not a reseller arrangement. Combined with Adhere Digital’s full Google Premier Partner capabilities in Shopping campaign management, feed optimisation, and performance reporting, you get end-to-end expertise rather than a platform with no strategic support.

Ready to
Pay Less
Per Click?

If you’re running Google Shopping ads in the EU or UK and not using a CSS partner, you’re overpaying on every single click. Let’s fix that.

Get in touch with the Adhere Digital team today to discuss your Shopping setup, run a free feed audit, and find out how much you could save with Adhere CSS.

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