How is searching the reasons of distribution channels in economics system?

Searching:

Buyers and sellers are constantly engaged within search for consummation of required exchanges. Conversely, both buyers and sellers are engaged into double search process in the market place. The procedure of search involves uncertainty since producers are not certain of consumers’ requirements and consumers are not certain which they will be able to determine what they need. Marketing channels facilitate the procedure of searching. For illustration, products as like over the counter drugs are widely available from a wide variety of outlets as general stores, super markets, drug stores and provisional stores.