through which individuals, communities, and organizations can share, co-create, discuss, participate and modify user-generated content or pre-made content posted online. Some of the most popular social media websites, with over 100 million registered users, include Facebook, YouTube, WeChat, Instagram, QQ, QZone, Weibo, Twitter, Tumblr, Telegram, Reddit, Baidu Tieba, LinkedIn, LINE, Snapchat, Pinterest, Viber, MeWe, and VK.