The verb estar tells how one feels or where one is. Esta is the he/she/it conjucation of estar and so it translates to he/she/it feels or is
"Como esta" translates to "how are you" in English.
It can be translated to English as followed. This or this is.
its in english
It is deactivated.
"Esta buena chica" translates to "this good girl."
Ésta allí---This one (noun in fem. gender) over there
I am tired.
He is tired.
that means how are you
You (formal)/it/he/she is/are surrounded
He is dead
Machine