Advertisements are a worldbuilding element that offer designers a chance to showcase a wide range of products, services, and companies that exist in their fictional world. Advertisements may be posters, news ads, billboards, radio segments, television ads, ad blimps, hologram ads, email spam, or some other form of mass communication. When designing ads for your fictional world, consider the product being showcased as well as the company which produces it. There may be competitors also advertising their wares.