Google has introduced a new timeline of channel performance within Performance Max, which gives advertisers a clear explanation of how individual channels – Search, YouTube, Display, and others – contribute to campaign results over time.
What’s new. The timeline graph now shows channel level contributions over a selected period, paired with investment and performance filters. Marketers can see at a glance which channels are pulling their weight – and which aren’t.
Yellow Box – Channel Performance Evolution Over Time
Pink box (right) – All Ads, Product Listing Ads, Video Ads
Why do we care. Performance Max campaigns cover multiple channels at once, making it really difficult to know where the budget is being spent effectively. This update gives advertisers a visual timeline of channel-level contributions – so if YouTube isn’t performing well while Search is driving a lot of conversions, that’s now visible without digging into export data or relying on guesswork.
This allows you to spot trends at the channel level early and adjust inventory strategy or budget accordingly.
Big picture. Viewing gives advertisers a more efficient way to test PMAX performance without relying on Google’s automated decisions. If YouTube delivers slowly while Search drives the bulk of conversions, that’s now visible — and can inform budgets and inventory strategies going forward.
An important point. It’s not full transparency, but it’s a solid step in the right direction. Marketers have a neat way to spot PMax trending anomalies early and adjust accordingly.
First seen. This update was first noticed by the Head of Search at Le Mage du SEA, Axel Falck, who shared seeing this update on LinkedIn.
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