That means "How are you?" In a conversation, the best reply would be to say "Muy bien. Y tu?" which means "I am good. And you?"or you can say "Muy Bien, Gracias" meaning "very good, thank you"
If someone asks you "Como esta?" then it means "How is he/she?" You may be confused with "Como estas" wich means "how are you?". You would respond by saying
Bien (sounds like: Byen) meaning...
¿CÓMO ESTÁ USTED? Used in formal contexts with people you don't know or to be extremely polite. ¿CÓMO ESTÁS? Used in informal situations: with people you know or your friends.
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