People Details Page -
As you click on a person name then that particular person open in full person detail page which shows you detail, activity, and related tab.
People Details -
On the Details tab, you'll see all the default and custom fields you've chosen to display for people. This gives you context for who the person is and all the related information that you have added.
People Activity -
In the Activity tab, you'll see your interaction stats, which helps keep you on track with the frequency of your communication. Below that, you have your activity log, where you can see the details of each interaction you've had with the person and any updates that have happened on the person record. You can also filter this log to see relevant events.
People Related -
To the Related tab, you can see the deals, tasks, files, calendar events, drive attachments and projects associated with the person.