Updating a user's role
All users need to have (at least) one role associated with their profile. If you want more info about why roles are helpful, head here.
If a role needs to be updated:
Select 'Users' from the dropdown
Click on the 'Roles' tab under 'Users and Roles' in the upper left side of the app
Find the role you want to update and click on it to edit
This will open a page with a few columns containing all the permissions associated with a role. It'll look something like this (but likely with different boxes checked):
Tip: if you want more explanation about what those permissions are, head here.
Check/uncheck the box(es) next to the permissions you want associated with the role
Click the 'Save' button at the bottom of the screen