A poster is a temporary promotion of an idea, product, or event put up in a public space for mass consumption. Typically, posters include both textual and graphic elements, although a poster may be either wholly graphical or wholly text. Posters are designed to be both eye-catching and informative.
The main function of a poster is to capture a moving audience with a message. When designing a poster, plan its design carefully. You will have a short amount of time to attract and hold your readers attention. Think about the one aspect of the information that must convey the message and plan your design around that.