Creative diversity is about how different your ads are from each other, not how many you have. A comedy skit, a product demo and a customer review are diverse. The same script in five colors is not.
Why it matters on Meta
Since Meta Andromeda, Meta matches ads to people largely based on what's in the ad. Near-identical ads get treated as roughly the same ad and compete for the same people. Different ads give Meta different ways to reach different buyers.
Diversity vs. variation
- Diversity: new concepts, formats, angles, creators, styles. Each one can find a new audience.
- Variation: new hook, headline or color on a proven ad. Good for extending a winner, but it doesn't add much reach.
You need both. Most accounts have plenty of variation and not enough diversity.
More: Creative diversity on Meta.
Related: ad concept, iteration, ad angle.