Introduction - If you have any usage issues, please Google them yourself
Spider " (Spider) is the Internet, a useful procedure, the search engine spider programs will use to collect Web pages to the database, enterprises use a competitor' s site spider program to monitor and track changes to individual users to download Web pages with the spider in order to de- machine use and development are the use of Web spiders scan your checks invalid links ... ... for different users, spider have different uses. So, spider in the end how does it work?