Distribution channels involve intermediaries that make products available for consumption. They provide efficiency, contacts, experience, specialization, and scale. Key functions include information, promotion, contact, matching supply and demand, negotiation, physical distribution, financing, and risk taking. When designing marketing channels, marketers consider objectives, distribution tasks, alternative structures, relevant variables, and select channel members to develop an efficient channel structure. Channel decisions are influenced by many factors including market, product, company, intermediary, and environmental variables.