The main purpose of signs is to communicate, to convey information designed to assist the receiver with decision-making based on the information provided. Alternatively, promotional signage may be designed to persuade receivers of the merits of a given product or service. Storefront signage is often the first thing that a potential customer notices about your business, that’s why it’s important to make sure that yours makes a great first impression. An effective storefront sign will let your customer know what your business is called and clearly let them know what you do.