Performance MaxPMax
Performance Max is Google Ads' AI-driven campaign type that serves across Search, Display, YouTube, Discover and Gmail from a single asset group.
What does Performance Max actually mean?
Performance Max (PMax) is Google's flagship AI-driven campaign type, launched in 2021. It replaces the old Smart Shopping and Local campaigns and serves your ads across every Google surface (Search, Display, YouTube, Discover, Gmail and Maps) from a single asset group.
The trade-off is control vs. reach. PMax doesn't expose keyword-level or placement-level controls; you provide assets (images, videos, headlines, descriptions, audience signals) and Google's machine learning decides what to serve where. This makes it powerful for advertisers with clean data and weak for those needing granular optimization.
PMax campaigns reward breadth of creative: multiple images, videos, headlines and descriptions per asset group (Google accepts up to 20 images and 15 headlines). AI ad generators are particularly useful here because PMax asks for more creative variety than many teams can produce by hand. (advrt doesn't publish to Google Ads yet. Its images and 16:9 videos can be downloaded and uploaded manually; Google Ads support is on the roadmap.)
Example
A DTC brand uploads 20 product images, 3 videos, 15 headlines and 15 descriptions per asset group. PMax tests combinations across Search, YouTube and Display, surfacing winning variants automatically.
When it matters
PMax is the default Google Shopping replacement for ecom. The bottleneck is creative volume rather than bid strategy, so AI generators have an outsized effect on PMax campaigns.
Related terms
Smart Bidding
Smart Bidding is Google's family of automated, ML-driven bid strategies: Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value.
Target ROAS
Target ROAS is a Smart Bidding strategy on Google (and Meta's equivalent on Advantage+) that sets bids to hit a specified return on ad spend.
Shorts
Shorts is YouTube's vertical short-form video format: 9:16, up to 60 seconds, monetizable as ads via Demand Gen and Performance Max.
Demand Gen
Demand Gen is Google's mid-funnel campaign type for YouTube Shorts, Discover and Gmail. It replaced Discovery campaigns in 2024.
Advantage+
Advantage+ is Meta's AI-driven campaign suite (Shopping, App and Sales) that automates audience, placement and budget decisions.
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