What is hey there meaning from a girl?

"Hey there" is a casual and friendly greeting that a girl may use to start a conversation with someone she knows or wants to meet. It can also be used to grab someone's attention or let them know that she sees them. The tone of the greeting may vary depending on the context and relationship between the girl and the person she is addressing. However, in general, it is a positive and welcoming gesture that can lead to further interaction and communication.