The short answer

Product feed optimisation should make your product data more useful to Google and more useful to your business.

That means improving the fields Google uses to understand products, fixing Merchant Center problems, and creating labels that let campaigns reflect margin, stock, category value, seasonality, and performance.

If the work stops at rewriting a few product titles, it is too shallow.

Why feed work matters

Google Shopping and retail Performance Max campaigns rely on product data. Google does not have a keyword list in the traditional Search-campaign sense. It uses the feed, landing pages, user intent, and account signals to decide when products should appear.

That makes the feed one of the highest-leverage parts of the account.

Poor feed data can cause:

Feed work is not a magic trick. It is input quality.

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What should be included

A useful feed optimisation scope should include:

The exact priorities depend on the catalogue. A fashion brand with variants has different feed problems from a furniture brand with long consideration cycles.

For larger catalogues, the agency should not try to fix every field with equal urgency. The work should be prioritised by commercial impact. A title issue across the top 50 products matters more than a minor description issue on products that rarely receive impressions. A Merchant Center warning on a hero category matters more than cosmetic feed tidying in a low-priority category.

This is where feed optimisation becomes strategy rather than admin.

Product titles

Titles are often the visible part of feed work, but they need restraint.

The goal is not to stuff every keyword into every title. The goal is to put the product into words a buyer and Google can understand.

For example, "Black Waterproof Hiking Jacket - Men's - Lightweight" is more useful than "Summit Pro Jacket" if people search by product type, material, gender, and use case.

A good agency should create title rules by category, not random rewrites product by product.

Product type and category

Product type is your own taxonomy. Google product category is Google's taxonomy.

Both matter. Product type helps reporting and structure. Google product category helps Google understand what the item is and which policy or attribute expectations apply.

If product types are inconsistent, reporting gets messy. If categories are wrong, eligibility and matching can suffer.

Custom labels

Custom labels are where feed optimisation becomes commercially useful.

Useful labels can include:

These labels let a Google Shopping agency structure campaigns around business reality. Without them, everything is trapped inside generic product groups.

Google supports up to five custom label fields, from custom_label_0 to custom_label_4, and lets advertisers define what those labels mean. That limit is useful because it forces discipline. You cannot label everything, so you have to decide which business dimensions actually change bidding or reporting.

A simple setup might be:

LabelExample use
custom_label_0Margin band
custom_label_1Seasonality
custom_label_2Stock depth
custom_label_3Price band
custom_label_4Bestseller or priority status

The labels are only valuable if they are used. A beautiful labelling system that never changes campaign structure, reporting, or budget decisions is just tidy data.

Merchant Center diagnostics

Feed optimisation should not happen in a spreadsheet while Merchant Center is shouting about problems.

Review disapprovals, limited products, mismatched prices, missing identifiers, image issues, shipping settings, returns settings, and policy warnings.

Fixing a title is useful. Fixing eligibility across a profitable category is usually more useful.

What an agency should deliver

Expect more than "we optimised the feed".

A good deliverable includes:

Feed optimisation should leave the account easier to manage.

A practical before-and-after example

Before feed work, an account might have product titles like:

Those names may make sense to the brand, but they do very little for a cold shopper or Google's matching system.

After feed work, the same products might become:

The improved titles are not stuffed with nonsense. They simply add the attributes a buyer would use to recognise the product. That is the difference between useful feed optimisation and keyword dumping.

When feed optimisation is not enough

Sometimes the feed is not the only issue.

If pricing is uncompetitive, images are poor, product pages lack trust, shipping is unclear, or conversion tracking is wrong, feed work can only do so much.

The best agencies will say that plainly. Feed optimisation helps Google understand the product. It cannot make a weak offer compelling.

Feed work also needs maintenance. Prices change, ranges change, products go out of stock, promotions start, variants are added, and product pages are rewritten. A one-off feed cleanup is useful, but the best results usually come when feed quality is treated as part of ongoing Shopping management.

A practical strategy stack

It helps to think of feed optimisation in layers.

Layer one is eligibility. Are products approved, accurate, and compliant? If products are disapproved, limited, missing identifiers, or showing price and availability mismatches, fix that before trying to be clever.

Layer two is understanding. Do the titles, product types, categories, images, and descriptions help Google understand what the product is and who should see it?

Layer three is control. Do custom labels, product types, and category structures make it easy to manage budgets, targets, exclusions, and reporting?

Layer four is commercial refinement. Does the feed reflect margin, stock, price bands, seasonality, clearance, best sellers, and business priorities?

Most accounts skip from layer one to random title tweaks. The better strategy is to build the layers in order.

Product title formulas by category

There is no universal product-title formula, but category-specific rules help.

For fashion, a useful structure might be: brand, product type, gender, material, colour, size or fit.

For furniture, it might be: product name, product type, material, colour, size, room or style.

For supplements, it might be: product type, key ingredient, strength, quantity, use case.

For electronics, it might be: brand, model, product type, key specification, size or compatibility.

The title should include the attributes buyers actually use to compare products. It should not become a dumping ground for every possible keyword.

Attribute priority

Some attributes are hygiene. Some change performance.

High-priority attributes usually include:

Lower-priority fields can still matter, but they should not distract from the fields that affect eligibility, matching, trust, and management control.

For example, missing GTINs across a major category may deserve immediate attention. Slightly thin descriptions on products that never receive impressions may wait.

Common feed mistakes

The most common mistakes are not dramatic. They are small, repeated issues that make the account harder to manage.

Watch for:

These issues do not always stop ads from running. That is why they are easy to miss. They quietly reduce matching quality, reporting clarity, or commercial control.

How to measure whether feed work helped

Feed work should be measured carefully because results do not always show as an instant ROAS jump.

Look for:

The key is to compare the right products before and after the change. A whole-account ROAS view can hide whether the feed work actually improved the products you touched.