At Propel, continuous integration (CI) and continuous delivery (CD) processes enable rapid feature releases multiple times a day, with documentation of changes published on an internal Slack channel as "deployment notes" or "release notes". This documentation serves customer communication by providing a record of when changes were shipped to production, allowing for prompt communication with customers. It also aids in internal communication by documenting the state of production and facilitating collaboration among engineers. Deployment notes are essential for incident response, particularly rollbacks, where they provide clarity on timelines and steps to take. While tools exist to automate changelogs, Propel finds it best to explicitly author deployment notes and require human approval before releasing them.