Instagram is a social media app that allows users to share photos and videos. It has over 1 billion monthly active users. The app uses a simple color scheme focused on the shared content. Key features include photo sharing, editing tools, hashtags, and the ability to like and comment on other users' posts. Advertising is Instagram's main source of revenue, with sponsored posts costing companies between $350,000 to $1 million per month. Legal issues include copyright infringement and problems may arise from influencer marketing without proper disclosures. Research shows Instagram and Snapchat are very popular social apps among youth, while bullying remains a concern for some users.