WordPress profile is the information you’d like to be shown along with your name when you comment on WordPress sites. It can be updated by visiting your Profile Settings page or clicking on your Gravatar in the upper-right corner.
On a WordPress website, users with the administrator role can see their profile page under Users » Your Profile. Other users will see a Profile tab in the admin sidebar.
All information included on your profile will be active for all blogs owned by your account. This information is publicly accessible by anyone on the internet, so you should only enter information that are you are comfortable sharing with everyone
there are plugins that allows you to give your users the ability to view and edit their profile from the front-end of the website.