A free photo sharing application that allows users to take photos, apply a filter, and share it on the service or a variety of other social networking services.
When you post a photo or video on Instagram, it will be displayed on your profile. Other users who follow you will see your posts in their own feed. Likewise, you'll see posts from other users who you choose to follow.
If you face any issue with your Instagram account using the web interface, ask it here.
Questions about an issue with the Instagram Android app belong at Android Enthusiasts.
Questions about an issue with Instagram on iPhone or iPad belong at Ask Different.