What does instagram do?

Answer 1

Instagram is a social media platform where you can share your photos, videos and checkout other people photos and videos.

You can follow your friends, celebrities to keep check on their photos and videos, you can like their photos, comment on them but you cannot download photos from Instagram, in case you want to download photos from Instagram, you can use software like 4K Stogram.

Answer 2

Instagram is an online photo-sharing platform that uses your smartphone's camera to take pictures and, if you choose, apply retro filters to them. The app allows you to post these pictures on your profile, which you can then share with friends and family.