<human>:  Help me with mastering common Spanish greetings.
<bot>: Greetings are an important part of any language, and Spanish is no exception. To master Spanish greetings, start by learning how to say "hello" in Spanish. Say "Hola" (OH-lah). You can also use the informal greeting, "¿Qué tal?" (KAY tahl?). If you want to greet someone more formally, use "Buenos días" (BWEH-nos DEE-ahs). To say goodbye in Spanish, use "Adiós" (ah-DYOHS). You can also use the informal ‘hasta luego’ (AH-stah LWEH-goh).