With the rapid development of network scale, the network will soon or has become as important as TV and newspapers, and people's daily life is increasingly inseparable from the network. Businesses that have been trying to promote the market will naturally not ignore such an important media as the Internet, and advertisements on the Internet will naturally appear. However, there is a big difference between internet, TV and newspapers: a TV program with high ratings naturally attracts more people, but advertisements on a web page with high daily visits are rarely clicked. How to effectively improve the click-through rate of merchants' web pages is a new problem faced by online advertisers. So they came up with a payment method: paying people who visit their web pages. Fundamentally speaking, this is the same as TV and newspapers: why do TV stations pay a lot of money to watch TV dramas for free, and newspapers only sell thick newspapers for a few cents?