Because Instagram is one of the most popular social apps, you may want to connect all of your social accounts to get the most out of it. You can choose to link your Twitter, Facebook, Tumblr, and Flickr accounts; there are also less-popular networks (in the United States, at least) that you can link to, including Ameba and VKontakte. To get your social accounts linked, go to the Profile Tab > Linked Accounts > Share Settings, then select which accounts you want to connect. Every time you upload a photo to Instagram, you’ll have the option to select which photos you want to share to each of the social networks. You can also choose to share your photos on Instagram only.