An avatar icon is a graphical representation of a user or a users character or persona in computing). It can take the form of a two-dimensional picture, also known as a profile picture or userpic, or a three-dimensional model, as used in online worlds and video games). Alternatively, an avatar can be an imaginary character with no graphical appearance, as in text-based games or worlds such as MUDs). Avatars can also be unique icons that represent a user or a character, designed to reflect the identity of users or the brands image. In internet forums and other online communities, avatars are two-dimensional icons known as profile photos, user pics, or formerly personal icons. Avatars can also be used as marketing tools to grab viewers attention with their artistic and creative expertise.