Permissions can also be set on the repository settings.
View Activity:
View deployment history.
View deployment revision history for specific deployment.
Deploy only if automatic deployment is set for environment.
View & Deploy:
All of the above, plus:
Initiate a deployment.
Retry a deployment.
Environment Access:
All of the above but only for a specific environment.
Full Access:
All of the above but for all environments, plus:
Add and edit servers/environments.
View deployment incidents.