The conversation between Matt Robinson and Stephane Copin highlights the importance of using data in day-to-day decision making for mobile teams. They discussed how data from Bitrise Insights and other tools helps them measure success, optimize workflows, and make better feature decisions. The team at Compass uses data to analyze their workflows, identify potential problems, and optimize their code and project system, resulting in a decrease in build time from 16 minutes to 12 minutes. Matt emphasizes the importance of measuring key metrics such as app binary size, compile time, build time, credit usage, test stability of UI and unit tests, and code coverage to optimize the app delivery process. Post-release, they monitor crash rates, error rates, user-related metrics, and Apple phased release data to optimize app performance. The team identifies critical bottlenecks by analyzing data and having a concrete relationship with guiding stars such as reducing engineer wait time. The panel discussion emphasizes the role of data in accelerating and excelling in mobile app delivery.