Google Shopping feed fixes that lift ROAS: a practical checklist for UK stores

With Google Shopping, you do not choose keywords in the usual way. Google reads your product feed and decides which searches your products are relevant for. That makes Google Shopping feed optimisation one of the most direct levers you have for better return on ad spend, and this checklist covers the fixes worth making first.

Why your feed matters more than your bids

If your feed describes products poorly, even a well-managed campaign will struggle to show for the right searches.

Your Merchant Center product feed influences:

• Relevance: which search terms your products are matched to.
• Click-through rate: how appealing your listing looks next to competitors.
• Approval: whether products are eligible to show at all.
• Campaign control: how easily you can split products into groups for bidding.

A cleaner feed often means less money spent on irrelevant clicks and more spent on searches from people likely to buy. That is the route to better ROAS.

Checklist 1: Fix errors and disapprovals first

Before optimising anything, make sure your products can actually show. In Merchant Center, check the diagnostics or product issues area (Google has redesigned Merchant Center more than once, so the exact labels may differ in your account).

Look for:

• Disapproved products and the reason given.
• Price or availability mismatches between your feed and your website.
• Missing required attributes.
• Image issues, such as promotional overlays or images that are too small.
• Landing pages that do not load or that Google cannot crawl.

Sort issues by how many products they affect and how important those products are to revenue. Fixing one problem that blocks your best sellers is worth more than tidying dozens of low-value items.

If you run Shopify, the Google & YouTube app can sync products to Merchant Center. It is a convenient starting point, but check what it sends. Some stores find they need a supplemental feed or a dedicated feed tool to get finer control over titles and attributes.

Checklist 2: Rewrite product titles for search

Titles are usually the most influential text in your feed. Google uses them heavily to match products to searches, and shoppers read them when deciding what to click.

A good title structure depends on the category, but a useful starting pattern is:

Brand + Product type + Key attributes (such as gender, material, colour, size)

Example: “Northfell Men’s Waterproof Leather Walking Boots Brown”

Practical tips:

• Put the most important words near the start, because titles are often cut short on screen.
• Use the words customers search for, which may differ from your internal product names.
• Include attributes that change buying decisions, such as size, capacity or material.
• Avoid promotional text like “Best price” or “Free delivery” in titles, as Google’s policies generally discourage this.
• Keep titles accurate. Do not add keywords for features the product does not have.

Checklist 3: Complete your product identifiers and attributes

Identifiers help Google understand exactly what you are selling and match it with the right searches.

Product identifiers

• GTIN: the barcode number for branded products. If a manufacturer has assigned one, include it.
• Brand: use the actual brand name.
• MPN: the manufacturer part number, where relevant.

If you sell your own products without barcodes, Merchant Center has a way to indicate that identifiers do not exist. Check Google’s current guidance for how to set this correctly.

Category and product type

Google may assign a Google product category automatically, but your own product type attribute is useful for organising campaigns. Use a clear hierarchy, such as “Footwear > Men’s > Walking Boots”.

Apparel and variant attributes

If you sell clothing or footwear, attributes such as colour, size, gender and age group are typically required for UK listings. Use item group IDs so variants of the same product are linked properly.

Checklist 4: Keep price, availability and shipping accurate

Mismatches between your feed and your website can lead to disapprovals and a poor experience for shoppers. They also waste spend if people click through to a product that is out of stock.

• Update your feed often enough to reflect stock and price changes. Daily is a common baseline for busy stores.
• Use the sale price attribute for discounts rather than changing the main price and back again.
• Set up shipping costs and delivery times accurately in Merchant Center, using pounds sterling for UK targeting.
• Add your returns policy details where Merchant Center supports it, as this can appear in listings.

Checklist 5: Improve images and descriptions

Images are what shoppers see first in Shopping results.

• Use clean, high-resolution images on a plain background for the main image.
• Add additional images showing different angles or the product in use.
• Avoid watermarks, text overlays and borders on the main image.

Descriptions carry less weight than titles, but they still help Google understand your products. Write clear descriptions that cover materials, uses, sizes and key features. Lead with the most important information.

Checklist 6: Use custom labels to protect profit

Custom labels (custom_label_0 to custom_label_4) let you tag products with your own information. They do not show to shoppers, but they are powerful for campaign structure.

Useful ways to use them:

• Margin bands: high, medium and low margin, so you can bid more on profitable products.
• Best sellers: products with a strong sales history.
• Seasonality: items that sell at particular times of year.
• Price bands: grouping products by price point.
• Clearance: stock you want to move.

This is where feed work meets profit. A product with a strong ROAS but a thin margin may make less money than a product with a lower ROAS and a healthy margin. Labelling by margin lets your paid media strategy reflect what actually ends up in your bank account.

Checklist 7: Use supplemental feeds and rules for control

You do not always need to change your store data to improve your feed. Merchant Center offers ways to adjust data within the platform.

• Supplemental feeds: add or override attributes, such as improved titles or custom labels, without touching your main feed.
• Feed rules: transform data automatically, for example by combining brand and product type into a title.

Keep a record of what you changed and when.

How to measure it

Feed changes should be judged on the money they make. Keep an eye on these metrics, ideally comparing similar time periods before and after changes.

Primary metrics:

• ROAS: conversion value divided by ad spend.
• Cost per acquisition: how much you pay, on average, for each sale.
• Conversion value: total revenue attributed to Shopping.
• Conversion rate: the share of clicks that turn into purchases.
• Profit after ad spend: if you track margin, this is the clearest view of performance.

Supporting signals:

• Impressions and clicks, which show whether products are reaching more relevant searches.
• Click-through rate, a good indicator that titles and images are working.
• Search terms reports, which reveal whether you are matching better queries.
• Number of approved products in Merchant Center.

Example: suppose a made-up product group spends £1,000 in a month and generates £3,000 in conversion value, a ROAS of 3. After improving titles, the same spend brings in £3,600, a ROAS of 3.6.

Make changes in batches and give each batch time to settle, since Shopping performance can fluctuate week to week.

Conclusion

Google Shopping feed optimisation is practical, repeatable work that compounds over time. Fix errors first, rewrite titles around how people search, complete your identifiers, and keep pricing and shipping accurate. Then use custom labels so your budget follows profit.

If you want help connecting your feed to real revenue, our paid media team focuses on ROAS and cost per acquisition rather than clicks alone. You can also book a free website evaluation to see where your store and feed could improve. For more practical guides, sign up to our newsletter.

Frequently asked questions

How often should I update my Google Shopping feed?

It depends on how often your prices and stock change. Many stores update at least daily, and busier stores may update more often. The aim is to keep your feed in line with your website so products are not disapproved or shown when out of stock.

Do I need a feed management tool for Shopify?

Not always. Shopify’s Google & YouTube app can be a good starting point for syncing products. If you need more control over titles, custom labels or attributes, a supplemental feed or feed management tool can help.

Will improving my feed guarantee a higher ROAS?

No change can guarantee results, because competition, pricing, seasonality and your website all affect performance. A well-optimised feed gives your campaigns a stronger foundation by improving relevance and reducing wasted spend. Measure changes carefully so you can see what works for your store.