The daily lives of people in the middle ages revolved around trade. Each day people went to work for guilds where they made specialized goods and sold them at low prices.
Trade brought lots of new innovations to towns. Merchants all brought new goods into the local town square on Sundays when everyone would gather around. Markets attracted lots of foreigners and brought new technology and goods as well. Eventually markets became a form of entertainment with minstrels, music, and plays. It brought use of math and measurments and eventually trade with a currency or money. The special forms of markets were called fairs, they had lots of rare goods such as silk, metal, or sometimes jewels. It was filled with amazing entertainment such as acrobats  and sword eaters.Eventually these markets and fairs developed into more entertainment and fairs such as we have today. Markets shaped society into a society filled with excitment.