Auto-eat can be used in several different occasions. Mainly used in PvP to quickly eat after or during a special attack from your enemy.
Can also be used to make other actions easy, such as mm2 caves prayer potion drinking, making sure your saturated heart is up whenever possible, auto-antivenom/poison and much more.
In here, you set your values to your eat profile.
This is where you can get really lazy, if you configure this correctly.
There are a bunch of options you can choose from to make stuff super AFK and not have to think.
This can be anything from Prayer potions, to antivenom to saturated heart, to death charge and a bunch more stuff
Here comes the big one.
PvP triggers work from t1>t2>t3
So you can enable all 3 at once, setting them up properly will automatically triple eat at x threshold. This mean you can set it to double eat at 40 hp, triple at 25 or below, or single eat at 60 (Example)