Yahoo! no relation Microsoft
Microsoft Advertising (formerly Bing Ads, Microsoft adCenter and MSN adCenter) is an online advertising platform developed by Microsoft that provides pay per click advertising on the Bing, Yahoo!, and DuckDuckGo search engines, as well as on other websites, mobile apps, and videos. In 2021, Microsoft Advertising surpassed US$10 billion in annual revenue.History
Microsoft was the last of the "big three" search engines (which also includes Google and Yahoo!) to develop its own system for delivering pay per click (PPC) ads.  Until the beginning of 2006, all of the ads displayed on the MSN Search engine were supplied by Overture (and later Yahoo!).  MSN collected a portion of the ad revenue in return for displaying Yahoo!'s ads on its search engine.As search marketing grew, Microsoft began developing its own system, MSN adCenter, for selling PPC advertisements directly to advertisers.  As the system was phased in, MSN Search (now Bing) showed Yahoo! and adCenter advertising in its search results.  Microsoft effort to create AdCenter was led by Tarek Najm, then general manager of the MSN division of Microsoft. In June 2006, the contract between Yahoo! and Microsoft had expired and Microsoft was displaying only ads from adCenter until 2010.
no relation