Crawling Through the Internet
Popular culture has given data crawler software a bad name. It is stereotyped as a tool used only by spammers to gather email addresses for use in their unwanted email ad campaigns. However, like any generalization, this is not the only truth. Data crawler software is often used for what is termed as spidering operations. These operations use data crawler software applications as a device to provide data for indexes. The most obvious use for such a device would be a search engine webpage indexing other websites to return search results. However, data crawler applications have uses from examining links to tell if they are broken to checking whether or not HTML code is valid and operational.
Web Scraper Video: