1. A method of tagging a virtual object contained in a virtual world, the virtual object associated with an item having an item type, a seller identification, an advertising location, and item details to create an object tag, the method comprising: tagging the virtual object with the seller identification; tagging the virtual object with the advertising location; tagging the virtual object with the item type; and tagging the virtual object with the item details; and externalizing, by a processor, the virtual object tag outside of its virtual world so that the virtual object tag is locatable by both of the following: a query generated by an avatar within a virtual world different than the virtual world containing the virtual object, and a query generated via an external electronic environment by users external to the virtual world.