Advertising and marketing involve communicating the value of products and services to potential customers in order to encourage sales. The global advertising industry is large, generating billions annually. Bartle Bogle Hegarty is a notable British advertising agency responsible for many campaigns over 30 years. Amaze was a video game developer that sold over 40 million units before being owned by entrepreneurs including Todd Gilbertsen, who now owns another company. Advertising and marketing are also linked to photography, magazines, and other industries that assist in visual product representation and information distribution.