Google has expanded its Performance Max (PMax) campaigns by adding support for vertical 9:16 image ads, allowing brands to create mobile-friendly visuals that fit naturally into platforms like YouTube Shorts and Discover. This update makes it easier for advertisers to engage users in mobile-first spaces where vertical content dominates.
A Step Toward Mobile-First Advertising: Google Performance Max
Google Performance Max now accepts the same “Story Image Ads” format first seen in Demand Gen campaigns earlier this year. The new feature was spotted by Google Ads expert Thomas Eccel, who confirmed that vertical image ads are rolling out across PMax.
Specifications:
- Minimum size: 600 × 1067 pixels
- Recommended size: 1080 × 1920 pixels
- Maximum file size: 5MB
Although Google has not officially confirmed all placement details, these ads are expected to appear in YouTube Shorts Image placements, similar to Demand Gen campaigns.
Marketing experts say this update is more than just a creative tweak. Phil Byrne, Founder of Positive Sparks Marketing LTD, noted that it helps advertisers “meet users where they naturally consume content.” With platforms like TikTok, Instagram Reels, and Shorts shaping mobile behavior, vertical visuals are now essential for capturing attention.
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Mike Ryan, Head of Ecommerce Insights, added that PMax is already monetizing Shorts with “GMC Image Shorts,” which use multiple product images for remarketing and personalization. This move signals Google’s deeper investment in short-form, shoppable media, strengthening Performance Max’s position as a one-stop solution for automated, AI-driven ad delivery.
With this update, Google Performance Max continues to evolve, giving advertisers new creative tools to improve engagement and performance across Google’s growing mobile ecosystem.
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