This document discusses artificial intelligence and its role in the metaverse. It begins by introducing key terms related to the metaverse like virtual reality, augmented reality, blockchain, and AI. It then discusses several technical aspects of the metaverse that AI can enhance, such as natural language processing, machine vision, blockchain, networking, digital twins, and neural interfaces. It also provides an overview of the economic system of the metaverse and how it differs from the conventional economy. Finally, it discusses challenges to developing AI for the metaverse, such as limited training data for image and video understanding.