Online Widget callback URLs
So I have multiple catalog widgets and single offering widgets on different pages of our website. It appears that the callback url is universal and the video tutorial says to use the page where you're embedding the widget. Can I just use our main page? For example, I don't want someone signing up for a yoga class to be redirected to the fitness page when they're finished. It also asks for the default widget for the callback url, which also appears to be universal. Can I just choose not to select one?