Use the tags to mark work or Epics for easy grouping, viewing and accessing.
To manage all the tags in your project.
1. Click the
icon on the upper right corner of your screen after entering the project.
2. On the next page, select Tags from the setting navigator.
Click on the Add Tag button and give a name to create a tag.
You can see how many times each tag has been applied in both work details or project overview pane in the Time Marked columns.

Click Delete on the action bar to delete a tag.