Facebook is a social media platform launched in 2004 to connect people and allow sharing of life events through photos and statuses. It has over 1.5 billion users and generates most of its revenue from advertisements. However, it also faces legal and ethical issues around data privacy and negative effects on users' mental health. Snapchat is a photo messaging app launched in 2011 allowing users to send photos with captions and filters that disappear after being viewed. While popular with younger users, it also faces legal issues around data protection and copyright. WhatsApp is a messaging app acquired by Facebook that allows users to easily message friends but also collects personal user data.