LinkedIn

LinkedIn is a business networking website for people in professional occupations. Founded in December 2002 and launched on May 5, 2003 by Reid Hoffman, Allen Blue, Konstantin Guericke, Eric Ly and Jean-Luc Vaillant, it is mainly used for professional networking. In 2006, LinkedIn increased to 20 million viewers. , LinkedIn reports more than 259 million acquired users in more than 200 countries and territories.

The site is available in 20 languages, including English, French, German, Italian, Portuguese, Spanish, Dutch, Swedish, Danish, Romanian, Russian, Turkish, Japanese, Czech, Polish, Korean, Indonesian, Malay, and Tagalog. , Quantcast reports LinkedIn has 65.6 million monthly unique U.S. visitors and 178.4 million globally, a number that as of 29 October 2013 has increased to 184 million. In June 2011, LinkedIn had 33.9 million unique visitors, up 63 percent from a year earlier and surpassing MySpace. LinkedIn filed for an initial public offering in January 2011 and traded its first shares on May 19, 2011, under the NYSE symbol "LNKD".

LinkedIn's sales revenue has grown by an average of 89% over the past year, and its net profit has grown by an average of 139% annually. The Verge Startups blog listed it as one of the most successful startup companies by market capitalization, revenue, growth, and cultural impact.

It is the most redundantly used social network.