poster is any piece of printed paper designed to be attached to a wall or vertical surface.

Typically posters incorporate text and graphic elements, although posters may be either wholly graphical or wholly text.

Posters are designed to be both eye-catching and informative. Posters may be used for many purposes. They are a frequent tool of advertisers (particularly of events, musicians and films), and other groups trying to communicate a message.

Posters are also used for reproductions of artwork, particularly famous works, and are generally low-cost compared to original artwork.