The Sentry Release GitHub Action is a tool that automates release management for developers by integrating with GitHub Actions. It simplifies the process of deploying code to an environment and notifies Sentry of new releases, surfaces suspect commits in case of errors, and views un-minified JavaScript source maps. The action can be easily installed using a YAML file and requires setting up environment variables such as SENTRY_AUTH_TOKEN, SENTRY_ORG, and SENTRY_PROJECT. Once set up, the action automates the deployment process, allowing developers to focus on resolving errors quickly and efficiently.