The document discusses the biographies of four individuals and their relationship with Instagram, a social media platform launched in 2010 by Kevin Systrom and Mike Krieger. It highlights Instagram's impact on communication and engagement among teens and young adults, its popularity in countries like Brazil and the United States, and the concerns surrounding it such as cyber bullying and account hacking. Additionally, it mentions Instagram's business model, its acquisition by Facebook in 2012, and features organizations using the platform for awareness and fundraising.