The main purpose of signs is to communicate, to convey information such that the receiver may make cognitive decisions based on the information provided. In general, signs may be classified according to the following functions
Signs are any kind of visual graphics created to display information to a particular audience. This is typically manifested in the form of way finding information in places such as streets or on the inside and outside of buildings. Signs vary in form and size based on location and intent, from more expansive banners, billboards, and murals, to smaller street signs, street name signs, sandwich boards and lawn signs. Newer signs may also use digital or electronic displays.
signs conveying information about services and facilities, such as maps, directories, or instructional signs.
signs showing the location of services, facilities, functional spaces and key areas, such as sign posts or directional arrows.
signs indicating services and facilities, such as room names and numbers, restroom signs, or floor designations.