I sighned up to instagram about 3 months ago and since then I had a good experience with the app. It enables us to share our photos and videos with friends. Instagram can also be used as a camera app. The filters they provide are really amazing and thats the best thing about the app. We can set the privacy from public to private.
The app gives us control who sees our photos, videos, stories etc. Theres also an option to message our followers and people whom we follow. Its called direct. Overall a good social app.