Users can edit and maintain their profiles here.
As administrator you have the ability to add profile fields which the user fill out, to complete their profiles.
Simply go to WP admin - Users - Profile Fields and you can add custom profile fields.
Profile fields can be grouped into Profile Field Groups. To create a profile field group :
WP admin - Users - Profile Fields
Creating Custom profile groups.
On the members area it displays like the following :
Members area display of profile field groups.