These are the main reasons that drive people to use social media platforms:

• Nearly three-quarters of people around the world – except China – use Facebook on a weekly basis to keep up with their friends and relatives.
• About half of social media users use Facebook Messenger and WhatsApp to chat with others.
• More than 60% of social media users use YouTube to find articles to read or videos to watch.
• About a quarter of social media users use Twitter to keep up with bloggers, celebrities or online personalities.

The Reach and Usage of Social Media Platforms Q3 2016.