Throwback Thursday is all about posting old pictures that you liked. In Instagram, you get to snap photos, put a desired filter and transform the look of the photo. You can also share the photos on various social networks like Facebook and Twitter. The Instagram application is supported by Apple products such as iPhone, iPad and iPod Touch and all Android camera phones.
Throwback Thursday is the name of a weekly post theme that social media users participate in as part of a very general "throwback" activity for posting content.
On Thursdays, people usually post photos on sites like Instagram, Twitter, Tumblr or Facebook that are from the past. Photos can be from years ago or from just a few days ago. There aren't really any limitations, and it really just gives people an excuse to post more.