The document discusses different types of extended reality technologies including virtual reality, augmented reality, and mixed reality. Virtual reality immerses users in simulated environments, augmented reality overlays digital content on the real world, and mixed reality places rendered content onto screens around real objects to create rich virtual environments. Extended reality technologies can reduce distances, enable global collaboration, provide clearer explanations through experiences rather than just verbal descriptions, and lead to better experiences overall by making showing and doing preferable to only telling. These technologies present opportunities for impacting many people and fields through new ways of remote working, collaborating, and learning.