Atlassian touts release tracks as a way to “Plan, prepare, and ensure the success of product changes”.
By putting your Production instance on the Bundled track and your Sandbox on the Preview track, you should be able to review upcoming changes a month before they impact your users.
Which is indeed great. And Atlassian even provides release notes of these upcoming changes. But…

- The release notes that Atlassian sends to org admins via email are not availably anywhere publicly or permanently.
- The release notes lack screenshots and links to more details about the new features. Ideally there would be links to official Atlassian documentation, Community Forums announcements, JAC tickets etc.
- There seems to be no rhyme nor reason to the ordering of release notes. Changes only applicable to admins are mixed in with user-facing changes. Changes are not grouped by category.
So, https://releasetracks.atlassian.net/wiki/spaces/RT/ (Unofficial Atlassian Release Tracks Notes) is an attempt to remedy that situation, by taking Atlassian’s emailed Release Notes, putting them in a “permanent” location, hopefully better organized, and trying to add useful screenshots, links, etc.