Instagrama is an American photo and video sharing
social networking service founded by Kevin Systrom and Mike Krieger. In April 2012, Facebook Inc. acquired the service for
approximately US$1 billion in cash and stock. The app allows users to upload media that can be edited with filters and
organized by hashtags and
geographical tagging. Posts can be shared publicly or with pre-approved followers. Users can browse other users' content by tags and locations and view trending content. Users can like photos and follow other users to add their content to a personal feed.
Instagram was originally distinguished by only allowing content to be framed in a square aspect ratio with 640 pixels to match the display width of the iPhone at the time. In 2015, these restrictions were eased with an increase to 1080 pixels. The service also added messaging features, the ability to include multiple images or videos in a single post, and a 'stories' feature—similar to its main opposition Snapchat—which allows users to post photos and videos to a sequential feed, with each post accessible by others for 24 hours each. As of January 2019, the Stories feature is used by 500 million users daily.
