Search engines have redefined the way we search.Searching information is further simplified by search engines. But we do not aware of complexities involved in the searching done by search engines.
Spiders or robots crawl the web gathering the text and links from every page existed on the internet. Link analysis is performed to evaluate connection between sites by spiders on the page. In semantic stage, every page classified based on the words found by spiders.
Web page contains at least 71 links across the internet. Search engines' index helps rapid retrieval of information. Search engine take about .4 seconds for a search query. Currently, there are approximately 61,000 searches performed per every second. 32.3% of global population use the internet.