Shopify Google Ads Agency UK
Google Ads for Shopify brands that outgrew "set up Shopping and hope"
Most of our clients run on Shopify. Not because we're a Shopify-services agency, but because Shopify is where UK DTC brands at £3M–£100M live, and its data is the raw material for everything we do: feeds, margin tracking, and profit-led bidding.
We run Google Ads for UK Shopify and Shopify Plus brands spending £15k–£500k+/month, from single-brand stores to multi-brand retailers with catalogues of 200 SKUs to 6 million. The work starts with your feed app, your variants and your cost per item, not with a bid adjustment. Fixed fee from £2k/month fixed fee, never a percentage of media spend.
Trusted by leading brands
The three Shopify-specific problems we fix
1. The default feed is costing you money
Shopify's native Google channel produces a functional feed, not a competitive one. Titles built for your collection pages, not for search queries. Missing attributes. No custom labels. We rebuild the feed pipeline so every SKU carries search-led titles and commercial data (margin band, stock, price position) that campaign structure can act on. At one client, we optimised a ~2,000-SKU feed as the foundation of the entire engagement.
2. Your tracking says more than it knows
Duplicate purchase tags, checkout upgrades that broke conversions, revenue that ignores discounts, shipping and refunds. We verify server-side tracking and make conversion values reflect money, not order totals.
3. Google can't see your margins
Shopify knows your product costs; Google doesn't. We close that loop: contribution margin per SKU into the bidding via margin-adjusted values and cart-data COGS, so Smart Bidding optimises what you keep. That's POAS management, and it's the whole point.
More on the mechanics: our Google Shopping management and how POAS bidding works.
Who this is for
Shopify and Shopify Plus brands spending £15k+/month on Google Ads. If you're under that, take the free tools, the break-even ROAS calculator and our POAS reporting script, and come back when the account scales. Not sure where you stand? Take the POAS Scorecard.
What does a Shopify Google Ads agency actually need to control?
Four layers, in the order they break. Get the first three right and the account becomes manageable. Get the fourth right and it becomes profitable.
Feed app choice
Native Google & YouTube channel versus a rules engine. Chosen on whether you need calculated fields, supplemental feeds and margin-driven custom labels, not on app store rating.
Variant handling
Unique id per purchasable variant, item_group_id on the parent, correct size and colour attributes, availability synced to real Shopify stock rather than a nightly guess.
GA4 and server-side tracking
Customer Events pixels, checkout extensibility, consent mode v2 and a server container so conversion signal survives. Purchase values sent net of discount and VAT.
Margin data into bidding
Cost per item pulled from Shopify, loaded with shipping and returns, written back into the feed as contribution margin so Google bids on profit rather than revenue.
Which Shopify feed app should you use?
The native Google & YouTube channel is the default and it is genuinely fine for a clean catalogue under a couple of thousand SKUs with no margin segmentation. It becomes the wrong tool the moment you need calculated fields. A rules engine such as Feedonomics, Channable, DataFeedWatch or Simprosys can compute a value, band it and write it to a custom label. That single capability is what makes margin-based bidding possible.
- Can it write calculated fields from data Shopify holds, including cost per item?
- Can it publish supplemental feeds without republishing the whole catalogue?
- Does availability sync on inventory change, or on a nightly cron that leaves you advertising sold-out stock?
- Does it handle multi-currency, multi-market and multi-locale without duplicating product ids?
- Can it exclude products by rule (margin floor, stock cover, returns rate) rather than by manual list?
If your feed is the constraint, start with a Google Shopping feed audit before touching campaign structure.
How should Shopify variants be handled in Google Shopping?
Every purchasable variant should exist in the feed as its own item, with a unique id, the parent product set as item_group_id, and size, colour and material populated as real attributes rather than buried in the title. Collapsing variants up to the parent is the single most common Shopify feed mistake: it advertises sold-out options, loses the long-tail queries where the variant is the search, and makes SKU-level margin impossible because the profitable and unprofitable variants share one row.
The exception is catalogues where variant sets run to hundreds of near-identical rows. At that scale we publish a representative variant with accurate availability and price range, and hold the rest as supplemental data. See how this plays out at catalogue scale on high-SKU Google Ads.
GA4, Customer Events and server-side tracking on Shopify
Checkout extensibility, consent mode v2 and the Web Pixels API changed how Shopify reports conversions, and a lot of accounts have been quietly mis-measuring since the migration. Under-reported conversions do not only make the reports pessimistic, they train smart bidding on an incomplete picture of which products convert.
Customer Events pixels
Purchase, begin_checkout and add_to_cart fired through the Web Pixels API rather than legacy theme snippets that checkout extensibility no longer runs.
Server-side container
A server-side GTM endpoint on your own subdomain so conversions survive ad blockers, ITP and consent gating.
Correct conversion values
Purchase value sent net of discounts, VAT and shipping so the number Google optimises towards is the number your P&L recognises.
Enhanced conversions and consent mode
Hashed first-party data with consent mode v2 defaults denied, so modelling fills the gap legitimately rather than silently under-counting.
Related reading: the Shopify Merchant API migration and your Google Ads history.
How Shopify cost data becomes the bid
This is the part almost nobody covers, and it is the actual mechanism behind POAS. Shopify already stores cost per item on every variant. Getting that number out of Shopify, loaded with the costs Shopify does not hold, and back into Merchant Center is what turns "profit-first" from a positioning line into a configuration.
1. Extract
Cost per item from every Shopify variant, plus historical returns rate and shipping cost by weight band and destination.
2. Calculate
Contribution margin per variant after COGS, shipping, payment fees and returns. Refreshed as prices, promotions and supplier costs move.
3. Publish
Margin bands and BOI® commercial job written into custom_label_0 to custom_label_4 via a supplemental feed in Merchant Center.
4. Bid
Campaign and asset group structure segmented on those labels, so targets follow margin behaviour rather than a blended account average.
Once margin is in the feed, every SKU can be assigned one of five BOI® commercial jobs (Scale, Profit, Protect, Recovery, Gateway) and bid to that job. Read the framework on the BOI® methodology page, or why we bid on POAS rather than ROAS.
Who this is for
A fit
- Shopify or Shopify Plus, UK-based or UK-trading
- £15k/month+ per month on Google Ads
- Cost per item populated, or willing to populate it
- Judged on contribution margin, not on blended ROAS
Not a fit
- Below the minimum spend floor, where fees outweigh the gain
- Dropshipping models with no reliable cost data
- Brands wanting a percentage-of-spend arrangement
- Anyone who wants the ROAS number to go up regardless of profit
Shopify Google Ads agency FAQs
What does a Shopify Google Ads agency do differently?
The account work is only half of it. On Shopify the outcome is decided upstream: which feed app publishes your catalogue, how variants are handled, whether GA4 and server-side tracking survive checkout extensibility and consent mode, and whether cost data ever leaves Shopify. An agency that only logs into Google Ads is managing the last 40% of the problem.
Which Shopify feed app should I use for Google Shopping?
Google & YouTube (the native channel) is fine for small, clean catalogues but gives you almost no control over supplemental attributes or custom labels. For catalogues over roughly 2,000 SKUs, or any catalogue where you need margin bands, stock cover and commercial job written into custom_label fields, use a rules-based feed tool such as Feedonomics, Channable, DataFeedWatch or Simprosys. The deciding question is not price, it is whether the app can write calculated fields from your own cost data.
Should Shopify variants be sent to Google as separate products?
Usually yes. Each purchasable variant should be its own item with a unique id, item_group_id set to the parent product, and correct size, colour and material attributes. Collapsing variants to the parent hides out-of-stock options, breaks Shopping ads for the specific variant a shopper searched for, and makes SKU-level margin bidding impossible. The exception is variant sets so large they flood the feed with near-duplicates, where a representative variant plus accurate availability is the cleaner answer.
How do you get Shopify margin data into Google Ads bidding?
Shopify already holds cost per item on each variant. We export cost, add shipping and returns rates by category, calculate contribution margin per variant, and write it back into the product feed as custom labels and a supplemental margin value. Google then bids on a value that reflects profit rather than order value. That mechanism is the whole of POAS: without cost data leaving Shopify, profit-first bidding is a claim rather than a configuration.
Do I need server-side tracking on Shopify?
If you are spending £15k a month or more, yes. Browser-only tags lose conversions to consent, ad blockers and iOS. Shopify's Customer Events (Web Pixels API) plus a server-side GTM container, or the native Google channel's enhanced conversions, restores the signal that smart bidding needs. Under-reported conversions do not just make the reports look bad, they actively mis-train the bidding.
How much does Shopify Google Ads management cost in the UK?
JudeLuxe charges a fixed monthly fee from £2k/month fixed fee, never a percentage of media spend, with a minimum of £15k/month on Google Ads. Fixed fee matters more on Shopify than anywhere else, because a lot of the highest-value work (feed rebuilds, cost data pipelines, tracking repair) earns a percentage-of-spend agency nothing.
Do you work with Shopify Plus?
Yes. Most clients at our spend range are Plus. The margin-data and feed work is identical; Plus gives us better checkout and API options for tracking.
Can you fix our feed without changing our Shopify setup?
Usually, yes. Feed work happens in the pipeline between Shopify and Merchant Center: your store, theme and product data stay untouched.
Do you use third-party feed or profit tools?
Where they earn their keep. The logic, margin-led bidding and commercial roles per SKU, is ours; tooling is chosen per account, not resold.
What about Meta ads for our Shopify store?
We don't run paid social. Ecommerce Google Ads is the entire company; that focus is why brands hire us.
See what your Shopify data is not telling Google.
We will review your feed setup, variant handling and conversion tracking, then rebuild the last 90 days of spend against contribution margin using your own cost per item. Yours to keep either way.
Book a Shopify Ads Audit