Your user profile page is accessible through menu under your name. You can update your profile information, upload a profile picture and see the list of communities you have joined.
Clicking on settings icon allows you to change "Email Notification" preferences.
Lunge user profile page also has badges which show how many hours you have logged in and how many challenges you have completed. Depending on your ranking with respect to other users, the badges will be displayed in Gold, Silver, Bronze or Grey colors.