A poster is a larger format printed document, usually from size A3 above, used for displaying information, promoting events, or showcasing artwork. It features text, images, or graphics designed to attract attention and convey a message to viewers. Posters can be printed on various materials such as paper, cardstock, or sticker and are commonly displayed in public spaces, such as on walls, bulletin boards, or storefronts. They serve as effective marketing tools for businesses, organizations, and individuals seeking to communicate a message or advertise products, services, or events to a wide audience.