LinkedIn is a social networking site primarily used for professional networking and job searching. It was founded in 2002 and launched in 2003. LinkedIn allows members to create a professional profile, connect with colleagues and peers, search for jobs, and discover business opportunities. The platform also offers tools for companies to showcase their brand and recruit potential employees. In addition, LinkedIn offers premium subscriptions with additional features and tools for users. As of 2021, LinkedIn has over 774 million registered members in more than 200 countries and territories around the world.