Yahoo is a web service provider offering a range of internet-based products and services, including a search engine, an email service, a news website and a financial website. It was founded in 1994 and is headquartered in Sunnyvale, California.

Yahoo's search engine was once one of the most popular on the internet, but has lost popularity in recent years. Today, Yahoo mainly generates revenue through advertising and its other internet-based products and services. These include Yahoo Mail, a free email service with over 225 million users, Yahoo News, a news website covering a wide range of topics, and Yahoo Finance, a finance website providing financial news, data and analysis.

Overall, Yahoo is a well-known and influential company in the technology industry and is known for its innovative products and services.