This feature allows you to combine duplicate user information into one user.
From the PeopleKeys account homepage:
1. Under "Special Features" find and click "Combine Users".
2. From the list find and select the first occurrence of the user information you want to combine and click "Select".
3. From the list find and select the second (remaining) occurrence of the user and click "Select".
4. Confirm that the information you entered is correct before clicking the "Save Changes" button.