WebReference.com finishes off their series looking at user personalization with this new tutorial focusing on the administrative section of their example site.

Administration of an application is necessary because any website or application that involves users becomes bloated and very slow. This can be because many users have stopped using the application without removing some of the information that they were using. As a result, a lot of redundant data is left in the system that causes it to become slow. For this reason, we need to have a section in the application that will do the 'clean up' of redundant data or 'house keeping'.

The administration script allows an admin to look at the bookmarks in each user's account and remove any that are older, duplicate or might not be needed anymore. The admin section also allows a current admin to promote a current user up to the admin level too.