For a Git managed project, a tag is a read-only copy that records the current state of the project at the point of time the tag is created.
Warning: When working in a tag, you can make changes to your project items, but you will be unable to permanently save your changes to an item unless you copy the item to a branch or master.
You can create a tag for a project in Talend Studio .
Note: Close all open editors in the design workspace before trying to create a tag. Otherwise, a warning message will appear prompting you to close all open editors.