Valve is providing developers with 30 days of average frame rate data for games that have achieved Steam Deck Verified status to help optimize performance for handheld gaming. This data allows developers to monitor performance, especially after updates, and addresses discrepancies between Verified ratings and user experiences. Valve plans to extend this feature to Steam Deck Playable games, potentially allowing developers to display performance metrics on store pages. The timeline view will help track performance impacts from updates, and developers may highlight impressive statistics on their store pages.