Signage is a term used to describe the use of billboards and posters as a form of advertising. Billboards and posters are large, printed advertisements that are placed in public areas such as streets, parks, and buildings. They are often used to promote products, services, or events. Posters are usually smaller than billboards and are typically placed in more confined spaces, such as store windows or on walls. Signage is an effective way to reach a wide audience and can be used to create brand awareness and recognition.