You would like to advise participants on how to update their profile, personal fundraising page, enter donations, and more.
Participants can login from your public website by hitting the Login button in the top right corner of each page. This assumes that the login is enabled. If not, you may enable it at Events -> Settings -> Advanced -> User Login Enabled. Administrators may also activate the Login page, so that it appears on the main menu, from Website -> Pages.
Login requires that users have created a login at the time of registration. The login consists of a username and password. To be sure that your participants create a username & password upon registration, enable that function from Website -> Fields.