Usually we all go to a store to buy something we need. But today we always want to buy something new or something special through the information from advertising and sometimes from TV show. It's quite different from the past.
In fact, people have been advertising for thousands of years. Long ago, some men called criers（叫卖人）walked up and down the street. They shouted about things that were being sold.
Later, people met at one place. This place was a market. Some people came to sell. Other people came to buy. But only those people who were at the market knew what were being sold. When people learned about printing, things changed. Soon there were newspapers. Many people read the newspapers. They saw many ads in the papers.
Later more people saw and listened to the ads on TV.
