On your blog, write a new 100 word post about the subject mentioned in the anchor text.

The software that searches for information and returns sites which provide that information is referred to as a search engine or web crawler. Everyone uses web crawlers-indirectly, at least! Every time you search the Internet using a service such as Alta Vista, Excite,  you're making use of an index that's based on the output of a web crawler. Web crawlers-also known as spiders, robots, or wanderers-are software programs that automatically traverse the Web.