With Facial Recognition enabled, admin users will have access to the People page. From here you can manage your existing identified people and update any unidentified people that feature in your Asset Bank images.
On the Identified tab people are ordered alphabetically and an algorithm decides on the most appropriate image to use for each identified person. For each, clicking the name tag will give you the option to edit the spelling or assign all of those assets to another person. This will effectively merge the two people (which can be useful if you accidentally created multiple entries for the same person).
Below each person, you have the option to view all assets that have been tagged with this name.
You also have the option to 'Delete this person', effectively removing the tag from all images of the person, and 'Delete person & assets'.
The Unidentified tab is the quickest way to add name tags to those not yet tagged. Clicking 'Add a name' gives you the option to identify a new person or add the assets to a previously identified person. All of the other options available on the Identified tab are applicable here too.