Your profile page contains information like your first name, last name and grade. If your role is a Teacher then when you create an application your name will be placed in the Teacher field and the grade will be selected accordingly. This should, in theory, speed up completing an application.
If your role is not a Teacher then your first and last name will appear in the first and last name of the new application. Likewise, your email address and mailing address information will be filled in as well.
Regardless of the initial values, you may change the contents of any field. These will be saved when you click the Save button.
You may also edit your user profile at any time.