The user profile page, which contains a list of all the questions, answers, and an audit trail of the user's activity on the site.
The user profile page is a collection of data about a particular user, accessed at a URL of
<site>/users/<userid> (example). You can access this page by clicking on anyone's username, such as your own in the top bar or the flair box shown next to questions and answers.
The profile page contains a biographical block that includes your reputation, league standing, account age, last date seen profile stats, and About Me. Privately to the owner of the profile, it will also display hidden details such as helpful flag and visited day statistics.
Reference: imported excerpt and adapted wiki from the main Meta Stack Exchange site.