Activity Logs record who did what and when inside your Mumara installation, giving you an audit trail of every significant change. You'll find them under Tools → Logs → Activity Logs, listed chronologically with the newest actions at the top.
Each entry shows a unique ID, the user who performed the action, the activity type, a description, and the exact date and time. Actions fall into three types — Created, Updated, and Deleted — and cover virtually everything you can configure: lists and segments, custom fields, broadcasts and campaigns, triggers, sending domains, sending nodes, bounce and FBL addresses, users and permissions, API keys, web forms, suppression lists, and application settings. Descriptions follow a consistent pattern such as "Sending Domain mail.example.com has been edited by John", with the item name and user shown as clickable links that take you to the relevant page. A search box lets you filter by user name, activity type, or description keywords.
Use Activity Logs to investigate issues (check what changed right before something broke), monitor user behavior in multi-user environments, and satisfy compliance audit requirements — they pair well with Authentication Logs, which show who logged in and when. Worth knowing: links for deleted items no longer work (the name is preserved for reference), only significant changes are tracked rather than every minor action, and older entries may be purged once they fall outside the retention period.