All NT web-hosting clients have the facility to use MS Access databases to add functionality to their Web site. All connections must be set up within clients' scripts. Reasoning for this can be found here . There are many things you can use Access databases for.
Popular uses are for tracking users to enter a site, and for creating a guestbook type application.
A good rule of thumb is to use Access databases for small, non-critical databases. There are some points that you should be aware of when using Access databases that may have a very significant impact on your site. Access databases are saved as text files, which means they can be subject to corruption Access databases have a connection limit of approx. 20 users, which is not alterable. If your site is expecting many concurrent users, you should not be using Access databases on heavily hit pages.