Registered clients who have access to their Customer Portal may want to edit various information to keep it up to date. Decide what kind of information you want to allow them to edit and what fields must be available for editing only to you. For example, you may want to allow them to upload their photo, update their postal address, change their password, etc.
To do so, go to section Personal → My profile in Site app and select the desired fields.
Only the selected fields will be visible in the Customer Portal: