An asset group is the building block of a Performance Max campaign: a collection of headlines, descriptions, images, logos and videos, together with a landing page and optional targeting hints, that Google mixes and matches to create ads for one product, service or theme. It does the job an ad group does in a search campaign, but it holds creative for every Google channel at once.
How asset groups work
Each asset group contains several kinds of material. At the time of writing (October 2026) the main ones are:
- Text: up to 15 short headlines, up to 5 long headlines and up to 5 descriptions, plus your business name.
- Visuals: images in landscape, square and portrait shapes, logos, and videos. If you add no video, Google may build a basic one from your images.
- A final URL: the page people land on, which Google may swap for a more relevant page on your site unless you control final URL expansion.
- Signals: an optional audience signal and search themes, which tell Google where to start looking for customers. They guide the campaign rather than restrict it.
- For retailers with a Merchant Center feed, listing groups, which decide which products the asset group can advertise.
Google combines these pieces for Search, Shopping, YouTube, Display, Discover, Gmail and Maps, choosing the combination it predicts will work best for each person and placement. Budget and bidding sit at campaign level, so every asset group in a campaign shares the same budget and goal. Google then decides how much of that budget each asset group gets, based on how it performs.
Why it matters
The way you split a campaign into asset groups decides how relevant your ads can be. If one asset group covers boiler repair, bathroom fitting and emergency plumbing, the images, headlines and landing page cannot speak clearly to any of them, and Google has no way to match the right message to the right search. Separate asset groups for each service let each one carry its own creative and landing page.
Asset groups are also where you get most of your insight into a campaign that otherwise reveals little. Performance reports by asset group, along with the asset ratings inside each one, show which themes and messages convert. For a UK business with a modest budget, that is often the clearest view available into what Performance Max is doing with the money.
There is a trade-off. Every asset group needs enough conversions to learn from. Splitting a small budget across ten asset groups usually leaves most of them starved of data, while two or three well-defined groups can each gather enough to perform.
Common mistakes
- Putting every product or service into one asset group, so the creative is generic and the landing page fits nobody exactly.
- Creating so many asset groups that the budget is spread too thinly for any of them to learn.
- Filling the slots with near-identical headlines, which gives Google little to test.
- Using stock images that could belong to any business, instead of real photographs of your work, premises or products.
- Treating the audience signal as targeting and expecting the campaign to reach only that audience.
- Pointing several asset groups at the same landing page with the same message, which makes them compete rather than complement each other.
How to act on it
Group by what the customer is looking for, not by how your business is organised internally. A London accountancy firm might have one asset group for small business accounts and one for personal tax returns, each with its own headlines, images and landing page. A retailer might group by product category or margin. Aim for a small number of asset groups that each have a clear audience and enough expected conversions.
Fill each group fully: every headline slot with a distinct message, real images in all three shapes, a logo, and at least one short video made for that theme. Add search themes and an audience signal built from your own customer data where you have it. After a few weeks, review results by asset group and check the asset performance ratings, replacing weak assets rather than starting again. Building and refining asset groups this way is central to how I run Performance Max management.