Metadataとは？

Metadata is the foundation of ASO discoverability. While visual assets like screenshots and icons drive conversion, metadata determines whether users can find your app in the first place. Each metadata field serves a different purpose and carries different ranking weight.

On iOS, the app title (30 characters max) carries the highest keyword ranking weight. Your subtitle (30 characters max) is the second most important field and appears directly below your title in search results. The keyword field (100 characters, comma-separated, not visible to users) is indexed but carries less weight than the title and subtitle. The long description is not indexed by Apple's search algorithm but can influence users who read it.

On Google Play, the app title (50 characters max) is the most important field. The short description (80 characters max) appears in search results and is indexed. Unlike iOS, Google Play indexes the full long description (4000 characters max), making natural keyword integration throughout the description valuable for Android ASO. Both platforms also consider the developer name and in-app purchase names in their ranking algorithms.

When optimizing metadata, avoid keyword stuffing — focus on natural language that reads well to humans while incorporating your target keywords. Update your metadata with every app update to capitalize on trending search terms and seasonal opportunities.