What is money?
Money is anything that is generally accepted as means of payment.

Before money was created, people used to exchange their goods and services for other goods and services from the other producers. This system was formally known as the barter system. There was no money involved therefore the price of one product was expressed in terms of another product, it is also known as the relative price.

For instance, if I were maize farmer and I wanted shoes, I maize. Should I find such a shoemaker we would negotiate an exchange ratio, for example: 1 pair of shoes6+ 3 bags of maize seeds. This is the same as saying that 1 bag of maize is equal to 1/3 pair of shoes. So,If I wanted to buy 3 pairs of shoes, I would have to give the shoe maker 9 bags of maize.