YouTubeis a video sharing service where users can watch, like, share, comment and upload their own videos. You Tube has Now more than 2 Active Billion users.
2 Facebook →
Facebookis a SOCIAL PLATFORM Which allows users, who sign-up for free profiles, to connect with friends, work colleagues or people they don’t know, online. It also allows the users to share pictures, music, videos, and articles, as well as their own thoughts and opinions with however many people they like. Facebook have more than 2.93 billion active users
Instagram is a free photo and video sharing app available on iPhone and Android. People can upload photos or videos to our service and share them with their followers or with a select group of friends. Instagram have more than 1 billion active users.