What-the-Diff is an AI-powered app that automates code review, making it easier and faster to review changes in pull requests. It uses the GitHub API to get the diff of a pull request, and then uses an AI model to generate a descriptive comment about the changes in plain english. This saves time and helps teams to improve their code review and continuous integration process. What-the-Diff also provides fine grained controls, such as configuring when and how to analyze pull requests and which files should be included/excluded from the summary. Finally, it can send weekly Slack notifications to stay up to date with the latest changes.