Facebook has over 1 billion users, making it the largest social media network in the world. Other top social networks include Tencent QQ with 784 million users, Skype with 663 million users, and Google+ and Twitter each with over 500 million users. When posting on social media, some engaging content types include sharing quality content, photos which see 39% more engagement, asking or answering questions, discussing mistakes and lessons learned, and sharing information from books and articles.