When turned on, Meta has the ability to expand targeting beyond your selected custom audience. The location, age, gender, and exclusions that you input will continue to be used as hard constraints.
When turned on, Meta can expand your audience to reach people beyond the Detailed Targeting (interests and behaviors) that you selected, but only if that expansion is expected to lead to better results. Location, age, gender, and exclusions are hard constraints, and the expanded audience will continue to follow those rules.
When turned on, Meta can expand your audience if it believes you can get better results by doing so. That expansion will be achieved by increasing the percentage of your lookalike audience, using the original custom audience for training.
Meta’s AI-powered targeting option. Meta will attempt to find your audience for you based on pixel activity, conversion history, and ad engagement. You can also provide targeting suggestions that Meta will initially prioritize before going broader.
An app activity custom audience is an audience used for ad targeting of people who launched your app or took specific actions while using it.