What is the maximum number of HTML, image, and video assets allowed per ad group for an app campaign?

For an app campaign, the maximum number of HTML, image, and video assets allowed per ad group is indeed 20. This limit is in place to ensure that Google Ads can effectively optimize ad delivery based on the performance of different assets. By having a structured maximum, it encourages advertisers to carefully curate their assets and focus on quality over quantity.

This limitation allows the campaign to function efficiently while still providing a variety of creative options, ensuring that the ads can adapt and perform well across various platforms and screen sizes. The total of 20 assets gives advertisers the flexibility to test and iterate on different creative formats to identify which ones resonate best with their target audience, ultimately aiming to improve engagement and conversion rates for app installations.