The document discusses various terms related to virtual representations of oneself online or in games. It defines an avatar as one's online representation, which can also be called a toon, alt, or character. MMORPGs are massive multiplayer online role-playing games where players interact through avatars in a virtual world. Common goals in MMORPGs include leveling up avatars by earning experience points through combat with monsters or completing quests. The document also discusses guilds/clans, immersive online environments, considerations for virtual world design, and examples of popular virtual worlds.