Android to help you free up memory and speed up your phone's performance.
To do this, you just need to mark the tasks you want to kill, and push the 'kill' button. In less than a second, all of those tasks will stop running, thus freeing up memory.
Among some of the most interesting options from Advanced Task Manager - Killer is the possibility to add applications to a 'ignore list' so that they'll never be killed. You can also enable a setting to kill the applications that start up when you start up your phone.