1. Facebook
Most of us already know that Facebook is the top social network on the web. It's a thriving beast of a social networking site on the web over a billions users. Despite holding the spot on the entire Internet for years now, it has to lead you to wonder just how long and what it might take for Facebook to eventually be brought down to a lower spot on the popular social site list. Time will only tell.
2. Twitter
Like Facebook, Twitter has also changed dramatically over the years, becoming a top source for real-time news sharing. For a microblogging site with a 140-character text limit, Twitter sure has made its mark online. Its an ideal platform for mobile users, and Twitter Card integration make it easy to share all sorts of multimedia content in tweets.
3. Google+
Making its debut in the early summer of 2011, Google+ became the fastest growing social network the web has ever seen. After failing a couple times already with Google Buzz and Google Wave, the search giant finally succeeded at creating something that people are actually excited about using -- especially alongside all the other popular Google apps and services.
4. YouTube
Where does everyone go to watch or share video content online? It's obviously YouTube. After Google, YouTube is the second largest search engine. Although owned by Google and now tied right into our Google+ accounts, YouTube can still be recognized as a separate social network all on its own as one that revolves entirely around content like video production, vlogging, movie-making and music sharing.
5. LinkedIn
Anyone who needs to make professional connections should be on LinkedIn. Known as the social network for your career, LinkedIn is right up there with Facebook, Twitter and Google+. Individuals can promote themselves and their businesses, outline their education and work experience, make connections with other professionals, interact in group discussions, post job ads or apply for jobs.