A Project Team Role is an optional label you can assign to a user to describe their responsibilities on the project. Roles are purely informational and do not control any settings, permissions, or feature access — they are simply there to help your team quickly understand who to go to for what.

Some common roles you might assign include:
No. Project Team Roles are completely optional and the feature works fine without them. If you have a small team where everyone already knows who does what, you can skip roles entirely. They become most useful when you have multiple people on a project and want to make responsibilities clear at a glance.