Instagram is an online mobile photo sharing, video sharing and social networking service that enable its users to take pictures and videos, and share them on a variety of social networking platforms, such as Facebook, Twitter, Tumblr and Flickr. Originally, a distinctive feature was that it confined photos to a square shape, similar to Kodak Instamatic and Polaroid images, in contrast to the 4:3 aspect ratio typically used by mobile device cameras. In August 2015, version 5 was released, allowing users to post photos captured in any aspect ratio. Users can also apply digital filters to their images. The maximum duration for Instagram videos is 15 seconds.
Instagram is a critically important social network. The photo-sharing app is not only important for retailers, restaurants, or travel companies; as one of the most effective brand-building tools available today, Instagram is increasingly important for every kind of business.
Instagram is now a hub where regular people find (and judge) the visual identity of a business. Without a strong Instagram presence, companies risk being ignored or forgotten, especially among the next generation of consumers. Among American teens, Instagram is actually considered the single most important social network.