Performance Max (PMax)
Google's AI-driven campaign type that runs across all Google channels from a single campaign.
Full definition
Performance Max (PMax) is a goal-based campaign type in Google Ads that uses machine learning to serve ads across Google Search, Display, YouTube, Gmail, Maps, and Discover — all from a single campaign. Advertisers provide asset groups (headlines, descriptions, images, videos) and audience signals, then Google's AI optimises delivery to maximise conversions. PMax can be powerful for e-commerce and businesses with clear conversion goals and sufficient conversion data. However, it offers limited transparency into where spend goes and can cannibalise branded search traffic. Best practice is to run PMax alongside Search campaigns with clear brand exclusions.
Real-world example
A furniture retailer uses Performance Max with product feed integration, allowing Google to serve shopping, display, and YouTube ads automatically to users showing high purchase intent across multiple platforms.
Related terms
A metric measuring revenue generated for every pound or dollar spent on advertising.
Read definitionThe average cost spent on advertising to acquire one customer or conversion.
Read definitionThe process of measuring specific user actions — purchases, sign-ups, calls — that represent business goals.
Read definitionThe real-time process search engines use to determine which ads appear for a given query and in what order.
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