Auto advance allows cues and certain cue foregrounds to advance automatically with no operator input.
If the cue does not contain a foreground, you can set the cue to auto advance to another cue after a set amount of seconds or when a background video is completed. You'll find this option when editing a cue at the bottom.
Slide, PowerPoint and Google Slide foregrounds can also auto advance. A common use for this is pre or post service looping announcement slides. You'll find this option when editing a cue that contains one of these foregrounds.