LinkedIn is the world's largest professional network on the internet with 309.3 million members across 242 countries worldwide (as of November 30, 2014), including 147 industry segments and executives from Fortune 500 companies.Founded on May 5, 2003, by Reid Hoffman and founding team members from PayPal and Socialnet.com, LinkedIn connects the world's professionals to make them more productive and successful. The site enables users to build a contact network consisting of their direct connections, the connections of each of their connections, as well as the connections of second-degree connections. This can be used to gain an introduction to someone a person wishes to know through a mutual contact. It can then be used to find jobs, people, and business opportunities recommended by someone in one's contact network. Employers can list jobs and search for potential candidates. Job seekers can review the profile of hiring managers and discover which of their existing contacts can introduce them. Users can post their own photos and view photos of others to aid in identification, and can follow different companies and receive notifications about the offers available. Individuals can bookmark jobs that they would like to apply for, view their page visitors, and congratulate others on their new employment or professional achievements.LinkedIn 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 Filipino.The company has a diversified business model with revenue coming from its talent solutions, marketing solutions, and premium subscriptions products and services. Headquartered in Silicon Valley, LinkedIn has offices across the globe. The Verge Startups blog listed it as one of the most successful startup companies in terms of market capitalization, revenue, growth, and cultural impact.