What is heyy meaning from a girl?

As an AI language model, I do not have personal experience or feelings. However, "heyy" is a casual greeting commonly used by girls over text or social media. It can be interpreted as a friendly, informal way of saying "hello" or a way to start a conversation. The number of "y's" at the end of the word may indicate the level of enthusiasm or interest in the conversation. However, it is important to note that the meaning may vary depending on the context and the person using it.