Performance Max
PMax / goal-based campaign / all inventory campaign
Performance Max is a single campaign that buys across all of a platform's inventory. Google lists YouTube, Display, Search, Discover, Gmail and Maps from one campaign. Microsoft advises giving it two to three times the budget of a standalone campaign, because it serves across multiple formats and inventory.
Google's description is compact and tells you most of what a buyer needs. Performance Max is a goal-based campaign type that gives you access to all Google Ads inventory, including YouTube, Display, Search, Discover, Gmail and Maps, from a single campaign. Google positions it as something to complement keyword-based search campaigns rather than replace them.
That breadth is the selling point, and it is also the thing to hold in mind when reading a report. One campaign is buying on surfaces that behave very differently from each other, and the money moves between them.
There is an entry requirement most proposals skip. Google says you can create one if your campaign objective is Sales, Leads, Website traffic, or Local store visits and promotions, or if you create a campaign without goal guidance. So it is not available for every intent.
The number that should shape the decision comes from Microsoft, and it is unusually direct. Its best-practice guidance says to give Performance Max campaigns up to two to three times the budget of your historical standalone campaigns, precisely because the campaign serves across multiple ad formats and inventory. Microsoft also spells out what a smaller budget produces: not enough data for accurate optimization and insights, fewer conversion opportunities, and longer to gather anything meaningful.
In practice
The common version of this decision is a business moving an existing modest search budget into Performance Max and expecting the same money to do more. That is the case Microsoft describes as constrained. The campaign is being asked to learn across several surfaces on a budget sized for one, and the result is usually a longer wait for a worse answer.
Not the same as
- A search campaign
- That buys against keywords on one surface. This buys across a platform's inventory from one place.
- Automated bidding
- A bid strategy operates inside a campaign. This is the campaign type itself.
Why it matters to you
Performance Max is proposed to almost every advertiser at some point, and the two questions worth settling first are both answerable from the documentation. What inventory will this actually run on, and is the budget sized for a campaign that spans all of it. A supplier proposing it on the existing budget is proposing something the other platform's own guidance warns against.
What to ask or check
- 01Which surfaces will our ads run on, and can we see spend broken out by them?
- 02Is the proposed budget two to three times what our standalone campaigns run on?
- 03Does our objective qualify, and what happens to the search campaigns we already have?
What people get wrong
That it is a way to make an existing budget reach further. Microsoft advises two to three times the budget of a standalone campaign, and describes a constrained one as producing too little data to optimize on.
Red flags
- A move into Performance Max on the same budget the search campaigns had.
- A proposal that cannot say which surfaces the ads will appear on.
- Early results judged before the campaign has the budget to gather meaningful data.
Where you will see it
In campaign type menus on both platforms, and in almost every agency proposal to restructure an account.