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
Dragonfly (search engine) inconsistent with our mission, providing no information is more inconsistent with our mission," referring to the alternative of not servicing Chinese users at all. Google also downplayed the extent of the new search engine's censorship, reminding users that it also removes search results from its German, French, and U.S. platforms in order to comply with local government regulations in those countries. Ultimately, Google.cn received tepid acceptance: some commentators even praised the search engine with the logic that Chinese citizens, through conducting searches and observing which results had been removed, could better their understanding of what it was their government did