Lovelace notifications tray

Is there documentation on how to use this? It would be cool to display alerts or alarm status in that area.

What tray are you referring to?

EDIT: Circle it on the UI if you could please.

So this Bell circled in red…

If I click on it it looks like this

I dont know how to keep alerts in there. Also, is there a way to put alers in the black circle of pic 1?

THank you

You can add alerts there by using the existing persistent notifications feature: