This is the 328th most frequent Spanish word.
estas
"Estas" means "you are" (second person singular, present tense of "estar") or "these" (feminine plural demonstrative adjective).
In this sentence, 'estás' is the informal second person singular present form of the verb 'estar', used to ask about someone's well-being.
¿Cómo estás hoy?
How are you today?
'Estás' functions here as the informal second person singular present form of 'estar', indicating the person's current location.
Dime si estás en casa.
Tell me if you are at home.
Here, 'estas' is a demonstrative adjective referring to feminine plural nouns, specifically 'flores' (flowers).