To open an applicant profile you need to:
Click the Candidates drop-down menu in the left side-bar.
Click on Applicants.
Click on Applicant you want to open and you will see applicant's profile.
There is general information (including AI ranking) and contact details on the top of profile.
Then there are 6 tabs:
CV details - all candidate's data, including work experience, educations, skills and etc,
Application form - here is the application form and cover letter that were sent by applicant
Feedback - feedback for this candidate that was given by you or your team members
Attachments - any attachments connected with this applicant you can collect in this tab
Mailbox - you can send new email or view another mails connected with applicant
Activity - all actions connected with applicant are logged in activity tab (f.e. applied jobs, changed status, sent email and etc.)
Besides these tabs, there are a lot of another actions that you can do with applicant:
assign to another job
invite for another job
add to a group
add to a calendar
add a reminder