Performance Max has moved from “worth testing” to “impossible to ignore.” Since replacing Smart Shopping and Local campaigns in 2022, PMax has evolved from a black-box automation tool into a system advertisers can meaningfully guide, and it now accounts for roughly 45% of all conversions across the platform. If a meaningful share of your competitors’ budget is already there, your auction dynamics are shaped by PMax whether you run it or not.

Why adoption jumped so fast

PMax adoption rose from 60% of advertisers in 2024 to 71% in 2025, and the trend has only accelerated into 2026. The campaign type serves across Search, Shopping, YouTube, Display, and Gmail simultaneously, letting Google’s machine learning allocate budget to whichever surface is converting best in real time—something no human trafficking manual campaigns could match at the same speed.

Where advertisers get PMax wrong

The most common mistake is dumping the entire product catalog into a single asset group. PMax rewards themed, tightly grouped asset groups—organized around business outcomes, audience intent, or product category—because it gives the algorithm cleaner signals to optimize against. A kayak rental business running “Locals” and “Tourists” as separate asset groups, each with its own creative, will consistently outperform one undifferentiated group.

• Structure asset groups around outcomes, not SKU count.
• Feed PMax high-quality images and video across every required size.
• Set clear audience signals to guide early learning, then let performance data take over.
• Establish attribution rules before running PMax alongside other remarketing-heavy channels.

“PMax operates differently from every campaign type that preceded it—the challenge is working with its logic rather than against it.”

What this means for your business

PMax isn’t optional anymore, but it isn’t “set and forget” either. The advertisers winning with it are treating it as a system to be fed and guided—clean data, clear goals, and defined guardrails—rather than a black box to hand a budget to and walk away from.