65+ Social Networking Sites You Need to Know About

This website provides a list of the social media sites, a short description and the number of users of each site.  

https://makeawebsitehub.com/social-media-sites/

""Social media sites have also grown in numbers by leaps and bounds. As per the statistics revealed on Statista, approximately 2 billion users used social networking sites and apps in 2015. And, with the increased use of mobile devices, this number is likely to cross the 2.6 billion mark by 2018."