Tagging teammates increases the visibility of your path and gives credit to the teammates who you worked with. There are two roles possible:
Owner — The owner is the member who created the path. Only owners can make changes to the path.
Viewer — All other teammates are viewers. Viewers can see the path, but cannot make changes. Viewers can also see challenge submissions and provide feedback.
To add a teammate, click on "Path Settings" and scroll to the Teammates section. Search for your teammate by username, then click "Add". When viewing a path, teammates are listed under the "Detail" tab.