Instagram is a photo and video sharing social media platform launched in 2010. It gained popularity with over 100 million active users by 2012, when it was acquired by Facebook. Popular features include applying filters to photos and videos, following other users, and using hashtags for trends like #TBT and weekend hashtag projects. While it allows businesses to connect with customers through contests and location tagging, disadvantages include potential overuse reducing productivity and privacy risks from sharing personal information.