Releases
A release is a group of items that are developed together and mapped to a specific completion date.
To see all the releases listed for this project, select Releases at the top of the left panel. Select a specific release to see the items assigned to it.
If you include items in a release, you are assigning them to that release. If the release field is visible, you can use Reading View or List View to see the name of the release where an item is assigned.