This Spanish lesson introduces common Spanish greetings and farewells. It provides a vocabulary list of greetings including "¡Buenos días!", "¡Buenas tardes!", "¡Buenas noches!", "¡Hola!", "¡Adiós!", "¡Hasta mañana!", "¡Hasta pronto!", "¡Hasta luego!", "¡Chao!", and "¡Nos vemos!". The lesson explains when each greeting or farewell would be appropriately used and provides practice scenarios for students to identify the right greeting for different times of day or situations.