You can do actions to a user (such as archiving, flagging, sending a welcome email etc) by clicking the 3 horizontal dots by the persons name then selecting from the menu.
Profile information can be added or changed by clicking the pen and paper looking icon on the left hand side of the page.
You can see which courses the user has started or completed as soon as you open their profile. For courses that are 'In Progress' you may see that some of the row is coloured in blue to signify how much progress they have made. If you want to see a list of all courses on the account and their completion status, press the 'Toggle result/courses' button.
If you hover over one of the circles to the left of the course (or the key icon) then the key should appear.
You can also view the events for that user! Simply scroll to the bottom of the page and it should appear. Actions such as registration, automated emails being sent and courses being started will appear here.