I use mine to do several things.
When the last person leaves home, it checks to see if my "guests" variable is active. If it is, none of the below happens.
Powers down all TVs and lights during the day, sets certain lamps on during the evening/night.
If the Roomba hasn't run yet on that day, it starts up and cleans certain rooms. while cleaning, it turns lights on and off so it can see better.
while we're away, certain push notifications get enabled, such as motion on the front porch.
Also, I changed the way I'm tracking us after the life 360 nonsense went away. I