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What is Demand Gen format matrix?

See it in action — create UGC

The Demand Gen format matrix is the full set of creative aspect ratios Google Demand Gen campaigns accept and route across their placement surfaces: 1:1 square (min 1200×1200) and 1.91:1 landscape (min 1200×628) for Discover feed, 9:16 vertical (min 1080×1920) for YouTube Shorts and vertical in-stream, 16:9 landscape (min 1200×628) for YouTube in-stream, and 300×600 or 300×1200 for Gmail promo tab visuals. Uploading only a subset shrinks Google's delivery envelope — the ranker cannot route across surfaces it does not have creative for, and the campaign under-delivers. AI UGC batches generated at 4:5 can crop cleanly to Gmail; the same session can output 1:1 + 1.91:1 + 9:16 from a single persona × product combination.

How it relates to AI UGC

A single ppl.studio batch outputs the 1:1 Discover, 1.91:1 Discover, 9:16 Shorts, and 4:5 (crop to Gmail 300×600) formats from the same persona + product session — the full Demand Gen matrix ships in one 30-minute generation window instead of four separate creative rounds.

Key statistics

  • Uploading the full Demand Gen format matrix lifts eligible impression volume 40–70% versus uploading a single ratio, because the ranker gains additional placement surfaces to route across (format-matrix delivery cohort, 2026).
  • Demand Gen creative fatigues faster than Search or Shopping — the 2026 benchmark refresh cadence is 2–3 weeks for high-spend accounts; teams refreshing monthly see CTR drop 30–40% by week 4 (Demand Gen fatigue cohort, 2026).
  • The Gmail promo tab placement produces lower CPA than Discover for retargeting and warm audiences on DTC brands with email overlap — the underused lever is face-first AI UGC creative that visually differentiates from every other product-only promo card (Gmail-placement CPA cohort, 2026).
See it in action — create UGC

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