Google Autofill

I purchased a new device that comes with Android 11, I come to know that, it has some kind of autofill feature which is great for Password maintenance, Addresses, etc. But I don’t know how to use this thing, also does it support Brave or Chrome only.
Please clear this thing to me. I searched for this, but I got nothing in hands.

What is this device?

All android devices are same so I dont think anything will be that special. You can install bravr from google play store.