Signs, in general, serve the following roles or functions:
Maps, directories, instructional signs, or interpretive signage used in museums, galleries, zoos, parks and gardens, exhibitions, tourist and cultural attractions to improve the customer's experience.
Product names or prices are displayed on retail signage. Highway signs, billboards, digital stock market quotes, and so on.
Persuasion: promotional signage designed to persuade users of a company's, product's, or brand's relative merits.
Signs indicating the location of services, facilities, functional spaces, and key areas, such as sign posts or directional arrows, are examples of navigation/direction signs.
Signs indicating services and facilities, such as room names and numbers, restroom signs, or floor designations, are examples of identification.
Safety and regulatory signs include warning signs, traffic signs, exit signs, signs indicating what to do in an emergency or natural disaster, and signs conveying rules and regulations.
Exterior or interior navigation (e.g., with interactive screens in the floor as with "informational footsteps" found in some tourist attractions, museums, and the like, or with other means of "dynamic wayfinding") is possible.
Signs can be used in both public and private areas. Signs used on the outside of a building are frequently designed to encourage people to enter, while signs used on the inside are often designed to encourage people to explore the environment and participate in all that the space has to offer. Any given sign can play multiple roles at the same time.
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