An trade fair is an exhibition where companies in a specific industry can showcase and demonstrate their latest products and services. Trade fairs have been held in Germany since 1947 to boost the economy after World War 2. The document then lists various trade fairs around the world by industry and annual attendance. Trade fairs serve several purposes for participating companies including facilitating sales, networking, creating brand awareness, learning about new market trends, and generating leads. Participating in trade fairs requires tasks and resources but is considered necessary for companies.