Posters are similar to charts but are usually smaller, simpler, and bolder. Their main uses in education are to provide decoration, atmosphere, and motivation or to remind students of key points. A good poster should have a concise, single idea that is easily understood. It should use color well and be displayed in a place with good light where many people will see it. Posters are effective at attracting attention and conveying a message quickly without needing detailed study.