Instagram is a photo and video sharing social media platform. It was founded in 2010 by Kevin Systorm and Mike Krieger and was later acquired by Facebook for $1 billion. The platform allows users to take and share photos and short videos, add filters and frames, like and comment on other users' posts, and use hashtags to categorize content and join discussions. It has over 150 million monthly active users, most of whom are under 35 years old.