Avatar Embodiment is the psychological and technical phenomenon in which a user perceives a digital avatar as an extension or representation of their own body within a virtual or mixed reality environment. It involves mapping real-time motion capture, physiological signals, and expressive cues from the user onto the avatar to create a sense of ownership and presence. High-fidelity embodiment enhances social telepresence by allowing remote participants to express identity, emotion, and intent through their avatars.