The 'gated-access approach' (where contact with any professional requires either an existing relationship or an introduction through a contact of theirs) is intended to build trust among the service's members. Members can invite anyone (whether an existing member or not) to become a connection. LinkedIn allows members (both workers and employers) to create profiles and 'connections' to each other in an online social network which may represent real-world professional relationships. As of April 2017, LinkedIn had 500 million members in 200 countries, out of which more than 106 million members are active. As of 2015, most of the company's revenue came from selling access to information about its members to recruiters and sales professionals. Founded on December 28, 2002, and launched on May 5, 2003, it is mainly used for professional networking, including employers posting jobs and job seekers posting their CVs. LinkedIn is a business and employment-oriented service that operates via websites and mobile apps.

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