What does it mean to play metauniverse in the nebula?

A network term is popular recently. In fact, the metauniverse is a concept, a fusion of virtual world and real world. I believe that there are a group of people who came into contact with the Internet very early after 80s and played online games. This online game is actually a virtual world where everyone can get married, do tasks, grow up, make friends and buy a house. You can buy equipment, clothes, improve your ability and so on. You can also start mining or planting, selling things, and trading online games.