ASO Glossary
Keyword field (Apple)
A hidden 100-character field where you can list comma-separated keywords visible only to Apple's search algorithm.
The keyword field is Apple-only and one of the most under-used ASO levers. You get 100 characters total, comma-separated, no spaces (commas only). Don't repeat words that appear in your name or subtitle; those are already indexed. Don't use plurals/singulars of the same root; Apple stems them. Don't use spaces between keywords (waste of characters). Common patterns: pack 12-18 distinct, high-volume keywords. Google Play has no equivalent — Google indexes your full description text instead.