"Olá" is a Portuguese word that means "hello." It is commonly used as a greeting in various Portuguese-speaking countries, including Brazil and Portugal. The word is informal and friendly, making it suitable for both casual and semi-formal interactions. In addition to being a greeting, "Olá" can also be found in various cultural contexts, such as in music and literature. It is often used in songs and phrases to convey warmth and friendliness, reflecting the welcoming nature of Portuguese culture.