Look how this Sanrio cutie welcomes you to our fanart Sanrio Hello Kitty Greets Sticker! Have you been questioning why people greet each other? They do it to acknowledge each other's presence and show respect or friendliness. Greetings are a social convention, being a way of showing sociability and building relationships. A warm and friendly greeting can make someone feel welcomed and appreciated, which can help to establish a positive relationship.