This document discusses evaluating user experience through playtesting. It outlines the benefits of playtesting, including budget and time savings, structured feedback, and data-driven decisions. Playtesting involves recruiting target users to test and provide feedback on marketing materials, gameplay, retention, and monetization over multiple sessions. Key metrics include social scores, gameplay flow, and specific element ratings. The document provides details on sample sizes, testing processes, inviting audiences, analyzing feedback, and staffing a playtesting project.