| Merge Request | Review requested | Participants, Watchers, Subscribers, Custom notification level with this event selected, and the old reviewer. |
| Merge Request | Review requested | Participants, Watchers, Subscribers, Custom notification level with this event selected, and the old reviewer. |
| Merge Request | Reopened | Subscribers and participants. |
| Merge Request | Reopened | Subscribers and participants. |
| Merge Request | Title or description changed | Any new mentions by username. |
| Merge Request | Title or description changed | Any new mentions by username. |
| Merge Request | Added as approver | Custom notification level with this event selected. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/12855) in GitLab 16.7. |
| Pipeline | Failed | The author of the pipeline. |
| Pipeline | Failed | The author of the pipeline. |
| Pipeline | Fixed | The author of the pipeline. Enabled by default. |
| Pipeline | Fixed | The author of the pipeline. Enabled by default. |
| Pipeline | Successful | The author of the pipeline, with Custom notification level for successful pipelines. If the pipeline failed previously, a "Fixed pipeline" message is sent for the first successful pipeline after the failure, and then a "Successful pipeline" message for any further successful pipelines. |
| Pipeline | Successful | The author of the pipeline, with Custom notification level for successful pipelines. If the pipeline failed previously, a "Fixed pipeline" message is sent for the first successful pipeline after the failure, and then a "Successful pipeline" message for any further successful pipelines. |
