This document discusses how to make sprint retrospectives more data-driven and effective. It recommends collecting both objective metrics like burn down charts and velocity, as well as subjective feedback from the team. The data should be presented using tools like Jira to surface insights and guide the retrospective discussion. Setting clear expectations for the retrospective, tracking action items, and adapting based on learnings are emphasized as keys to success. Data-driven retrospectives can help teams continuously inspect and adapt their processes.