How many Spanish greetings do you know?…
Are you the kind of student who uses the same old words for everything?…
—Buenos días
—Hola, Mike, ¿cómo amaneciste?
—Buenos días
—¿Qué?
—¿Buenos días?
—¿De qué hablas?
—Buenos días…
No doubt, if you want to speak better Spanish, and you want to communicate with native speakers, you need to know different ways to say hello in Spanish.