Yahoo! (/ˈjɑːhuː/, styled yahoo! in its logo) is an American web services provider. It is headquartered in Sunnyvale, California, and operated by the namesake company Yahoo! Inc

Yahoo! (/ˈjɑːhuː/, styled yahoo! in its logo) is an American web services provider. It is headquartered in Sunnyvale, California, and operated by the namesake company Yahoo! Inc., which is 90% owned by investment funds managed by Apollo Global Management and 10% by Verizon Communications.
It provides a web portal, search engine Yahoo Search, and related services, including My Yahoo!, Yahoo Mail, Yahoo News, Yahoo Finance, Yahoo Sports and its advertising platform, Yahoo! Native.
Yahoo was established by Jerry Yang and David Filo in January 1994 and was one of the pioneers of the early Internet era in the 1990s. However, its use declined in the late 2000s as some of its services were discontinued, and it lost market share to Facebook and Google
In January 1994, Jerry Yang and David Filo were electrical engineering graduate students at Stanford University, when they created a website named "Jerry and David's guide to the World Wide Web".
The site was a human-edited web directory, organized in a hierarchy, as opposed to a searchable index of pages. In March 1994, "Jerry and David's Guide to the World Wide Web" was renamed "Yahoo!" and became known as the Yahoo Directory.
The word "yahoo" is a backronym for "Yet Another Hierarchically Organized Oracle" or "Yet Another Hierarchical Officious Oracle".The term "hierarchical" described how the Yahoo database was arranged in layers of subcategories. The term "oracle" was intended to mean "source of truth and wisdom", and the term "officious", rather than being related to the word's normal meaning, described the many office workers who would use the Yahoo database while surfing from work.
Yahoo grew rapidly throughout the 1990s. Yahoo became a public company via an initial public offering in April 1996 and its stock price rose 600% within two years.Like many search engines and web directories, Yahoo added a web portal, putting it in competition with services including Excite, Lycos, and America Online. By 1998, Yahoo was the most popular starting point for web users,and the human-edited Yahoo Directory the most popular search engine, receiving 95 million page views per day, triple that of rival Excite.
It also made many high-profile acquisitions. Yahoo began offering free e-mail from October 1997 after the acquisition of RocketMail, which was then renamed to Yahoo Mail.
Yahoo began using Google for search in June 2000. Over the next four years, it developed its own search technologies, which it began using in 2004 partly using technology from its $280 million acquisition of Inktomi in 2002. In response to Google's Gmail, Yahoo began to offer unlimited email storage in 2007. In 2008, the company laid off hundreds of people as it struggled from competition.
In February 2008, Microsoft made an unsolicited bid to acquire Yahoo for $44.6 billion. Yahoo rejected the bid, claiming that it "substantially undervalues" the company and was not in the interest of its shareholders. Although Microsoft increased its bid to $47 billion, Yahoo insisted on another 10%+ increase to the offer and Microsoft cancelled the offer in May 2008.
On September 22, 2016, Yahoo disclosed a data breach that occurred in late 2014, in which information associated with at least 500 million user accounts,one of the largest breaches reported to date. The United States indicted four men, including two employees of Russia's Federal Security Service (FSB), for their involvement in the hack.On December 14, 2016, the company revealed that another separate data breach had occurred in 2014, with hackers obtaining sensitive account information, including security questions, to at least one billion accounts.
On September 11, 2001, Yahoo! announced its partnership with FIFA for the 2002 FIFA World Cup and 2006 FIFA World Cup tournaments. It was one of FIFA's 15 partners at the tournaments. The deal included co-branding the organization's websites.
Yahoo! sponsored the 2012 Sundance Film Festival. NBC Sports Group aligned with Yahoo Sports the same year with content and program offerings on mobile and desktop platforms.
Yahoo announced television video partnerships in 2013 with Condé Nast,WWE, ABC NEWS, and CNBC. Yahoo entered into a 10-year collaboration in 2014, as a founding partner of Levi's Stadium, home of the San Francisco 49ers.
The National Basketball Association partnered with Yahoo Sports to stream games, offer virtual and augmented-reality fan experiences, and in 2018 NBA League Pass. Yahoo Sportsbook launched in November 2019, a collaboration with BetMGM.
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