Template:Infobox software Instagram (sometimes shortened to Insta or IG) is an online photo and video sharing social networking service. It allows users to take pictures and videos, apply digital filters to them and share them to their followers. They can then share them on a variety of social networking services, such as Facebook, Twitter, Tumblr and Flickr.
Until 2015, Instagram confined photos to a square shape, similar to Kodak Instamatic and Polaroid images. This was different than the 4:3 aspect ratio typically used by digital cameras. Users were able to share very short videos. In 2017 the length limit was raised to ten minutes.