Program statuses are the steps people go through in a program (e.g. Invited, Registered, Attended, No Show). These steps are defined by the Channel. You can modify your channels in the Admin section of your instance:

Channels For Statuses.png

Remember to add Change Program Status flow steps to all of your local asset campaigns:

Change Program Status flow step.png

Program Statuses are important for keeping track of peoples' progression through your programs and will give you insight into that program's influence on revenue