A social media website and smartphone application owned by Facebook that allows users to take, edit and share both photographs and videos on a variety of social media platforms.

Note: Users can share content on the network itself or on other social media networks such as Facebook, Twitter, Tumblr or Flickr using the application to link to the other networks. To expand your photo feed or see what specific users are posting, you can search for and follow your friends as well as view popular photos posted publicly. The most popular element is the option to add various filters to your photos to give them distinct styles. Other components include the ability to comment on and to like other users’ photos and to mark each of your own with the geographical location it was taken.

A photo feed on Instagram, as opposed to elsewhere on social media, consists of the constantly updated stream of photos posted by people you already follow that you can view with the application.

Sources:

Instagram.com: https://www.instagram.com/about/faq/

Business Insider: http://www.businessinsider.com/instagram-2010-11?op=1/#res-what-the-camera-screen-looks-like-you-can-also-pick-a-photo-from-your-image-library-switch-to-the-front-camera-or-toggle-the-flash-on-and-off-the-big-button-at-the-bottom-takes-the-picture-8

WhatIs.com: http://searchcio.techtarget.com/definition/Instagram