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The 2026 Performance Max Asset Specs Cheat Sheet

Everything you need to know about PMax asset requirements—from image dimensions to the hidden mobile truncation trap that's killing your CTR.

PMax runs across multiple Google properties. Each placement has different requirements—but Shopping ads are where your feed matters most.

Here's what Google doesn't tell you: while they allow 150 characters for product titles, mobile Shopping ads only display 70-75 characters. The rest gets cut off.

One of the biggest PMax misconceptions: people think their campaign headlines affect Shopping ads. They don't.