We can’t imagine our lives without online communication. Years ago, we would wait for weeks to get a letter in the mailbox. Today, however, we don’t even start our mornings until we’ve checked the news feeds on Facebook and Instagram and read messages on Messenger, WhatsApp, Snapchat, and LinkedIn. Just take a look at the number of active users of the most popular mobile messaging applications across the US.
Sometimes, it’s hard to say whether an application with social features such as profiles, following, connections, sharing, and feeds is a social network. So what can be considered a social network? Is Medium a social network? Or Reddit? Or SoundCloud? To understand how to develop a social networking site, let’s first consider a social network definition.


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