<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=236228) </details> <!--IssueSummary end--> ### Problem to solve As a developer, when I use the new [Merge Request Review](https://about.gitlab.com/releases/2018/10/22/gitlab-11-4-released/#merge-request-reviews) feature, I'd like the Slack integration to inform my coworkers I've finished. This is closely related to [issue 4326](https://gitlab.com/gitlab-org/gitlab/-/issues/4326) which tackles the same use case, but for email notifications. ### Intended users This is for developers and any people in a team using MRs. ### User experience goal This probably needs more reflexion, but I believe probably a new checkbox in the Slack Integration configuration page (https://[domain]/[orga]/[project]/-/services/slack/edit), near "Merge request" could be added for "Merge request reviews". When this checkbox is checked, then whenever a MR Review is done, a message would be posted on the associated Slack channel with a text akin to "Sasha reviewed merge request [!xxx Title of MR] (link to MR)" This would greatly help communication in teams that rely on Slack for they day to day work.