Tutorial: It's all connected in GitLab

This post details how to leverage cross-referencing within GitLab issues, merge requests, and commits to link related work. It explains the syntax for referencing issues (`#123`), MRs (`!123`), and snippets (`$123`). It also highlights the automatic closing of issues when a merge request description includes 'Closes #ID' or 'Fixes #ID'. The post emphasizes the role of issues as the single source of truth and the use of labels and milestones for organization.