Performance Max: what you still control.

Performance Max is Google's most automated campaign type. Google describes it as one goal-based campaign with access to all Google Ads inventory: YouTube, Display, Search, Discover, Gmail and Maps. You don't pick keywords, placements or audiences. Google does.

That leads a lot of advertisers to one of two wrong conclusions. Either PMax is a black box you can't steer, so you leave it alone, or it's a magic box that will find customers on its own. Neither is true. You give up the controls you're used to, but you keep a smaller set that matters more: what it learns from, where it can't go, what it says, and what it isn't allowed to take credit for.

This guide is those controls, in the order we set them.

What you control, and what Google does

The quickest way to understand PMax is to sort every lever into two piles.

Everything in the left column is set once and checked often. Everything in the right column is why the left column matters so much.

Control 1: the conversion goal is the real targeting

In a Search campaign, keywords do most of the targeting. In PMax there are no keywords, so the conversion goal does that job. PMax uses Smart Bidding to find more of whatever you count as a conversion, across every channel at once. If that conversion is easy to fake or cheap to get, PMax will find a lot of it.

This is the root of most PMax lead quality problems. A campaign optimizing toward a form submission, with no way to tell a real prospect from a bot or a student, will happily fill the form with both. We cover the full fence in PMax spam leads are structural, but the first layer is always the goal.

• Optimize toward the action that means a real prospect, not the first click of interest. For B2B that is usually a qualified form or a booked call, not a content download.
• Check which actions are primary. Google bids toward every primary action in the goals a campaign uses. Two primary actions with the same value look identical to the bidding, which we explain in Smart Bidding can't tell a demo from a signup.
• Feed back what happened after the form. Offline conversion import and enhanced conversions give PMax a cleaner signal than a thank-you page ever will.

Control 2: audience signals are a hint, not a fence

This is the most misunderstood setting in PMax. When you add an audience signal, it feels like targeting. It isn't. Google's own wording is that signals are suggestions to help its AI optimize, that adding them is optional, and that Performance Max may show ads to relevant audiences outside your signals if they have a strong likelihood of converting.

Two practical consequences follow.

You can't do pure retargeting in PMax. Add your website visitors as a signal and PMax treats them as a starting point, then goes looking for new people too. If you want an ad shown only to people who already visited, PMax is the wrong campaign type for it.

The quality of the hint matters more than the size. A signal tells Google who your customer looks like. So give it your best data, not your broadest. All website visitors is a noisy hint: it includes job seekers, competitors and people who bounced in three seconds. A Customer Match list of people who actually bought, or became qualified opportunities, is a much clearer picture of who to find.

Google lists four signal types: your own data (website visitors, app users, customer lists, video viewers), custom segments built from keywords, URLs or apps, demographics, and Google's own segments such as in-market and affinity audiences. The one we lean on most in B2B is the custom segment built from URLs. Add your competitors' websites and the sites your buyers read, and you are describing people by what they browse, not by a category label. When we see search terms drift, this kind of tighter signal is often a better fix than piling on negatives.

Control 3: where it isn't allowed to go

PMax's exclusions don't sit where most people expect, and getting the level wrong means they silently do nothing. Our Google Ads exclusions guide covers this in full. The short version:

• Negative keywords work at campaign level, up to 10,000 per campaign, but only on Search and Shopping inventory. They don't touch YouTube or Display, and they don't match close variants, so add plurals and misspellings yourself.
• Brand exclusions can be applied to individual PMax campaigns, to keep your own brand or a competitor's out.
• Placement exclusions, content themes and sensitive content categories are account-level only. There is no campaign-level placement exclusion in PMax. Set these in the account, and set them before you launch.

That last point is the one we see skipped most. Content suitability is usually treated as something to revisit after a problem shows up. In PMax, where you can't exclude placements per campaign, it is one of the first settings to configure on day one.

Control 4: stop PMax taking credit for your brand

This is the single biggest reason PMax results look better than they are.

PMax serves on Search. If your brand terms aren't excluded, it can win auctions for people who were already searching for you by name. Those people were going to find you anyway. PMax gets the conversion, the campaign reports a great cost per acquisition, and it looks like the hero of the account.

The fix we recommend: apply a brand exclusion to PMax, and run your brand terms in a separate Search campaign on exact match. Brand clicks on Search are usually cheap, and now you can see two honest numbers instead of one flattering one: what brand demand costs, and what PMax actually acquires.

Two limits to know. In PMax, brand exclusions only cover Search and Shopping inventory, so PMax can still reach people who already know you on YouTube and Display; treat its brand-adjacent conversions with some suspicion even with the exclusion on. And don't cap the brand Search campaign's budget: Google says that when a Search campaign is limited by budget, PMax may occasionally serve on its exact match terms.

Control 5: decide which campaign wins a search

Running Search and PMax side by side is normal, but they can compete for the same query. Google publishes the order it uses:

1. Exact match keywords identical to the search term win first. A Search campaign with that exact match keyword is prioritized over PMax.
2. Phrase and broad keywords, and PMax search themes, that are identical to the search term come next and share priority. Google says search themes behave like phrase or broad match keywords.
3. If nothing is identical, Google uses relevance: the meaning of the search, the keywords in each ad group and the landing pages.
4. When options tie, the one with the higher Ad Rank serves.

In practice: if a search matters enough that you want to control the ad and the landing page, put it in a Search campaign on exact match. Leave PMax to find what you didn't think of. Two exceptions to the exact match rule: if that Search campaign is limited by budget, Google says PMax may occasionally serve on its exact match terms, so don't cap the budget on searches you need to own; and the priority rules don't apply to Shopping formats, so a PMax Shopping ad can still show alongside your exact match Search ad. Before you launch PMax alongside an existing Search campaign, look for overlap, because PMax's search inventory can quietly pick up queries your Search campaign was meant to own.

Control 6: assets, and what Google assembles from them

You supply the pieces. Google decides how they combine. An asset group takes up to 15 headlines and 5 long headlines, plus descriptions, images, logos and videos, and Google mixes them into ads for each placement. You don't get to choose which headline appears with which image.

That changes how you write them.

• Every asset has to stand on its own. Any headline can appear next to any image. If a headline only makes sense after another one, it will eventually appear without it.
• Treat images like posters, not photos. PMax is largely an image game on YouTube, Display and Discover. A plain stock photo with no brand and no message is easy to scroll past. An image that carries your logo and a clear line of value can do the work a headline does in Search.
• Upload your own video. If you don't provide one, Google may auto-generate one from your other assets.
• Set the call to action deliberately. In one of our own PMax campaigns, the Automated call-to-action setting meant no call to action showed at all, which we only found out through Google support. We now pick one explicitly, such as Book now.
• Split asset groups by audience or offer, not by creative format, so each group's assets and signals describe one buyer.

Control 7: the landing page, if you let it choose

Final URL expansion is on by default. With it on, Google may replace the landing page you set with one it thinks is more relevant to the search, and generate headlines and descriptions to match. For an ecommerce site with thousands of product pages, that can help. For a B2B site, it can send a paid click to a careers page, a blog post or a login screen.

You can turn it off in the campaign settings, or keep it on and exclude the pages that should never receive paid traffic. For most B2B accounts we turn it off, at least until the campaign has proven itself on the pages we chose.

Control 8: the reports you now have

PMax used to be criticized, fairly, as a campaign you couldn't see into. That has improved, and two reports are worth opening every week.

• The search terms report. Under Search terms, choose the view for Performance Max to see the searches that triggered your ads, including ones that didn't convert, and the ad format that served. Irrelevant terms become negative keywords. For Display and Video, Google's guidance is to use excluded content keywords in content suitability instead.
• The channel performance report. Under Insights and reports, it shows how Search, YouTube, Display and the other channels each contribute to clicks, conversions and cost. It is the closest thing to an answer to "where is my PMax budget actually going?"

Reading these weekly is how the controls above stay controls. Exclusions, signals and goals are not settings you apply once.

When to use PMax, and when not to

PMax is a strong campaign when it has three things: a conversion goal that reflects real value, enough conversion volume to learn from, and creative that works outside Search. Without those, it spends confidently in the wrong direction.

• Good fit: you already have clean conversion tracking, a known buyer, and Search covering your core intent. PMax then reaches people who never typed your keywords.
• Poor fit: a brand-new account with no conversion history, a goal that is easy to fake, or a need to control exactly who sees the ad, such as pure retargeting.

In B2B we usually build Search first, prove the conversion goal there, then add PMax as the expansion layer, with brand excluded and exclusions set before the first click. Google's own lead-generation advice takes a different route when volume is thin: start on micro-conversions and move up to higher-value actions as data grows. That can work, but on a goal that is easy to fake it teaches PMax the wrong buyer first, which is why we prove the goal in Search.

Common questions

Can you target a specific audience with Performance Max?

Not strictly. Audience signals are optional suggestions. Google says Performance Max may show ads to relevant audiences outside your signals if they have a strong likelihood of converting. To show ads only to a defined list, use a campaign type that targets audiences directly.

Can you add negative keywords to Performance Max?

Yes, at campaign level, up to 10,000, but they apply to Search and Shopping inventory only. They don't match close variants. Account-level negative keywords and brand exclusions also apply. For Display and Video, use excluded content keywords in content suitability.

Does a Search campaign or Performance Max win the same search?

A Search campaign with an exact match keyword identical to the search term is prioritized over Performance Max. Phrase and broad keywords and PMax search themes that are identical to the search term share the next level of priority, and ties go to the higher Ad Rank.

Should I exclude my brand from Performance Max?

Usually, yes. Without a brand exclusion, PMax can win searches from people already looking for you by name, which makes its results look better than its real acquisition. Running brand on exact-match Search keeps both numbers honest. In PMax, brand exclusions cover Search and Shopping inventory only.

Can I see which searches my Performance Max ads showed for?

Yes. The search terms report includes a Performance Max view showing the searches that triggered your ads, including ones that did not convert. The channel performance report shows results by channel.