Search engine is an indispensable tool to obtain information from the Internet. Since its birth in the early 1990s, it has been constantly updated and innovated. In the past 20 years, search engine is one of the fastest growing fields on the Internet. This change is not only manifested in the rapid development of search technology and the great promotion of network economy, but also in the ups and downs of search engines themselves.

The development history of search engine network has been discussed, please search and browse by yourself.