What is Performance Max?

How Performance Max works

A normal Google Ads account splits work by channel: Search campaigns for keywords, Shopping for products, Display for banners, Video for YouTube. Performance Max folds those into one campaign. Google lists its reach as YouTube, Display, Search, Discover, Gmail and Maps, and describes it as a way to reach all Google Ads inventory from a single campaign.^[1]

You don't choose placements or keywords. You give Google four things:

• A conversion goal. The actions you count as success, such as purchases or leads, with an optional target CPA or target ROAS.^[1]
• Assets. Headlines, descriptions, images, logos and videos. Google mixes them into ads for each channel.
• Audience signals. Lists such as past customers or site visitors. Google says these speed up learning; they are hints, not hard targeting.^[1]
• Budget and settings. Daily budget, locations, languages, and exclusions such as brand or placement exclusions.

Bidding is always Smart Bidding: in each auction Google predicts how likely a person is to convert and bids for that.^[1] Smart Bidding uses signals you can't set by hand, such as device, location, time of day, remarketing lists, browser and the actual search query.^[4]

What you control and what you don't

Performance Max trades control for reach. In practice that means:

• You control the goal, the target, the budget, the assets, locations, audience signals, search themes, brand exclusions and placement exclusions.^[1]
• You don't control which channel gets the money on a given day, which queries trigger your ads beyond the themes you suggest, or the exact bid.
• Final URL expansion lets Google send people to a different page on your site than the one you entered and build assets from it. Google notes you remain responsible for that content, so review it or turn the setting off if certain pages should never get ad traffic.^[1]

The main lever is the conversion goal. If you count a page view or a newsletter sign-up as a primary conversion, Performance Max will find cheap versions of that action. If you count only purchases with real order values, it bids for purchases.

Search themes: the closest thing to keywords

Search themes let you tell Performance Max what people search for. You can add up to 25 per asset group, and Google says they add to the queries the campaign would find from your URLs and assets.^[3]

They also set how Performance Max competes with your Search campaigns. A search theme has the same priority as a phrase or broad match keyword, and the one with the higher Ad Rank serves. An exact match keyword identical to the query stays ahead of both.^[3] Google adds that a keyword that is spell-corrected to the query counts too: in its example, the exact match keyword [plumbers] is preferred for the search "plumbrs".^[2]

When Performance Max is a good fit

• Online stores with a product feed. One campaign can show products, text and video ads, so a store does not need a separate campaign per channel to start.
• Accounts with steady conversion data. Smart Bidding works from the conversions you report, so it needs them flowing and accurate.
• Advertisers with creative. Video and image assets let the campaign use YouTube, Discover and Gmail instead of leaning only on text placements.

It is a weaker fit when:

• Conversion tracking is missing or counts the wrong action.
• You need to see and control every search term, as many regulated or very local businesses do.
• The budget is too small to spread across channels and still collect enough conversions to learn from.

Setting up a first Performance Max campaign

1. Check conversion tracking first. Only the actions you want more of should be primary goals. See how to set up conversion tracking.
2. Choose the objective (sales, leads, website traffic or local store visits) or build without goal guidance.^[1]
3. Set the budget. Google's budget panel offers up to three suggestions and calls the lowest one the minimum recommended budget for the campaign.^[1]
4. Leave the target blank at first, or set it near what the account already achieves. A target far from current results limits volume.
5. Build one asset group per product line or service, each with its own assets, audience signal and search themes.
6. Add brand exclusions if a separate brand Search campaign should own those searches.
7. Wait out learning before judging. Google says the Learning status lasts at most 7 days and that results usually settle within 1 to 2 conversion cycles.^[5]

How to judge it

Judge Performance Max on the same outcome you would judge any campaign on: cost per conversion against your target, or ROAS against your break-even ROAS. Two cautions. Brand searches can flatter the numbers because those buyers were already looking for you, so exclude brand or compare with brand campaigns separated. And conversion volume from cheap secondary actions should not count; check which conversion actions are primary.

RunAds builds Performance Max, Search and Shopping campaigns from your website, and you approve them before anything goes live. Signing up is free. Credit packs start at $25, and Google ad spend uses 5 credits per $1.

Sources

1. About Performance Max campaigns, Google Ads Help. Checked Nov 9, 2026.One campaign for all Google Ads inventory (YouTube, Display, Search, Discover, Gmail, Maps), run by Smart Bidding toward your conversion goals, with optional CPA or ROAS targets and audience signals.
2. How Performance Max interacts with other campaigns in your account, Google Ads Help. Checked Nov 9, 2026.A Search keyword that exactly matches (or is spell-corrected to) the query is preferred over Performance Max; otherwise the campaign with the higher Ad Rank serves.
3. Unlock new relevant traffic on Performance Max with search themes, Google Ads Help. Checked Nov 9, 2026.Up to 25 search themes per asset group. Search themes have the same priority as phrase and broad match keywords; identical exact match keywords stay ahead of them.
4. About Smart Bidding, Google Ads Help. Checked Nov 9, 2026.Strategies that use Google AI to bid for conversions or conversion value in every auction, using signals such as device, location, time of day, remarketing lists, browser and the actual search query.
5. About Smart Bidding learning, Google Ads Help. Checked Nov 9, 2026.The Learning status never lasts more than 7 days and ads keep serving. Performance usually converges in 1 to 2 conversion cycles; evaluate over 2 conversion cycles or 2 weeks, whichever is longer.

Every outside number on this page links to its source above, with the date we checked it.