The Project Role is the role assigned to a member for each project they work on. It grants them access to projects based on the role they play (e.g., team member, project lead, tester, etc.). This role determines if they can create, view, and modify project assets.
Here are a few important things to know:
Project role assignments automatically apply to all child projects (unless explicitly changed).
At any level in the project tree hierarchy, a member's project role can be changed to increase or decrease project permissions.
A member may have different roles on different projects.
Note that the Project Role is different than the Admin Privileges role (previously call the Default Role) see Understanding Admin Privileges and Project Roles for details.