Web search engine launched on June 1, 2009. On July 29, 2009, Yahoo! and Microsoft finalized a deal in which Yahoo! Search would be powered by Microsoft Bing technology. A search engine maintains the following processes in near real time: Web search engines get their information by web crawling from site to site. The "spider" checks for the standard filename "robots.txt", addressed to it, before sending certain information back to be indexed depending on many factors, such as the titles, page content, JavaScript, Cascading Style Sheets (CSS), headings, as evidenced by the standard HTML markup of the informational content, or its metadata in
Search engine privacy children may be an honorable goal, there are concerns about whether the government should have access to such personal data to achieve it. At other times, they may want it for national security purposes; access to big databases of search queries in order to prevent terrorist attacks is a common example of this. Whatever the reason, it is clear that the fact that search engines do create and maintain these databases of user data is what makes it possible for the government to access it. Another concern regarding government access to search engine user data is "function creep," a term