Instagram is an online social media networking service that allows individuals a place to share pictures and short videos. You are able to tag other users, apply filters and hashtags. People who follow you are allowed to like the content and comment on it. Like Twitter, Instagram has a system of Followers and Following options. You can make your account public or private. If you make your account private, then only the people you allow to follow you will see your content. Lots of Twitter users also have Instagram accounts and use it as the photo/video repository for their Twitter accounts. This is partly because Twitter initially allowed only text in tweets. Since Twitter now allows photos, using an Instagram account as a Twitter repository is a matter of personal preference.