Many shops have a change installed in their admin section that allows for better control of it. However, it also contains code that causes the admin login to timeout after a certain amount of time. This is a security feature for sites where the admin is open to people walking by. But for many shop owners, it is not needed and causes a great deal of grief as they have to continually log back in. This option will allow that timeout value to be set in admin, allowing the shop owner to control when it logs itself off.