Heya is a casual greeting often used in informal settings, similar to saying "hi" or "hello." It is commonly used among friends and peers, conveying a friendly and relaxed tone. The term is popular in various cultures and can be used in both spoken and written communication. In addition to its use as a greeting, heya can also express excitement or enthusiasm. It is often accompanied by a smile or wave, enhancing the friendly nature of the interaction. Overall, heya serves as a simple way to connect with others in a lighthearted manner.