A poster is a large printed sheet that displays information, images, or advertisements. It is often used for promotional purposes, such as advertising events, products, or services. Posters can be found in public spaces, schools, and businesses, and they are designed to attract attention and convey messages quickly. Posters can be made from various materials, including paper and vinyl, and they come in different sizes. They often feature colorful graphics and bold text to engage viewers. Common themes for posters include movies, concerts, and educational topics, making them a versatile tool for communication and marketing.