"Wait for program to exit"?

[Krazzeekane]

Hello all, I wanted to ask what the checkbox means under 'Run Program', the checkbox is called 'Wait for program to exit'. I don't understand what this means, and there is no Help section, nor a guide which explains the option (it isn't even listed on the main page which explains the other options).

I've tried selecting it, but haven't seen any difference in behavior. Does this button work? What does it do? Would love some answers. Sorry to ask it here, but I couldn't find anywhere else to discuss AutoActions and ask this question.