I'm generally the only one that actually interacts with the app, home assistant basically automates things on schedules and based on temperature and whether anyone's home or not.
So there's stuff like:
- preheat the office on cold work days
- make the robot vacuum clean the house if nobody's home
- turn the AC off if nobody's home
- turn the night light on in the baby's room and turn it off in the morning (change the colour when it's time to wake up)
I guess the goal is to keep the house comfortable while at home, while turning everything off when not to save energy without having to think about it.