In a barter system, where goods are exchanged directly without the use of money, double coincidence of wants is an important and essential feature. Money Serves as a medium of exchange, it also removes the need for double coincidence of wants and the difficulties associated with the barter system. For example, now it is not necessary for a farmer to search for a book publisher who will buy his cereals and at the same time sell him books. Now, he has to find a buyer for his cereals. Farmers now can exchange their cereals for money, and can purchase any goods or services which they need.