Metavers and web3 are widely presented as the new great Internet evolution that will strongly contribute to the development of companies in the years to come. However, companies that want to take an interest in these technologies quickly find themselves submerged in a flood of abstruse terms: digital twins, virtual reality, augmented reality, NFTs, gamification, avatars… They may even think they are in the middle of science fiction, with holograms and teleportation! How to find your way around and make useful use of these new technologies in order to fully integrate the “Era of the Metaverse”?