Instead of being on a computer, in the metaverse you might use a headset to enter a virtual world connecting all sorts of digital environments.
Unlike current VR, which is mostly used for gaming, this virtual world could be used for practically anything - work, play, concerts, cinema trips - or just hanging out.
Most people envision that you would have a 3D avatar - a representation of yourself - as you use it.
But because it's still just an idea, there's no single agreed definition of the metaverse.