Now that you are going to make millions with your Website (cough cough), you are going to have better things to do with your time than sit at your computer and submit it to the engines. The Schedulercan free you up from the tedium of submitting, ranking, submitting, ranking...
You can even start AddWeb in Scheduler On modewhen your computer starts as you saw in the Preferences Tutorial.
The most important thing to remember where the Scheduler is concerned is that it can't do anything if you are not connected to the internet.