Many companies are asking Forrester about the metaverse: what it is, what action they should take if any, and when. The metaverse will be the 3D experience layer of the internet. No viable metaverse exists yet — only its precursors. But as it emerges, most people will tune it out unless the user experience (UX) is good. So start envisioning metaverse experiences now, based on a human-centric design foundation and the 10 principles for extended reality design that this report lays out.