Social networking involves building social relationships and connections among people who share interests. The first recognized social network was SixDegrees.com, which launched in 1997. Popular social networks today include Facebook, with over 850 million monthly active users who share photos and connect through games and apps. Twitter sees 175 million tweets sent per day. LinkedIn has over 225 million members worldwide who use the site for professional networking. YouTube is visited by over 2 billion people each day. Instagram grew rapidly after its launch in 2010 and was acquired by Facebook in 2012. Social networking allows people to expand their networks, share experiences, and stay connected on a global scale.
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