What is Metaverse & how can I use it?

Technologies in the future of the Metaverse and the human experience - or to quote Mark Zuckerberg: "The deep sense of presence. An embodied internet where you feel like you are directly involved.".
We are on the cusp of a new technological era: the metaverse. Like previous paradigm shifts, the metaverse will qualitatively change every aspect of the human experience.