With Instagram's standard personal account settings, anyone in the world can see your Instagram profile and any and all photo or video content that you post to the social service.
If you're sharing photos of your children, or images that reveal your home, or if you're just a private person, you may wish to protect your profile from snooping eyes. You can choose to make your Instagram account private. This means that only other Instagram users that you've approved can see your content.
If you're looking to turn your existing public account into a private one, we can help. Here's a simple walkthrough to take you from visible to privacy-protected, on iOS, Android, and via a browser. Read more...More about Instagram, How To, Tech, and Social Media Companies
from Mashable https://mashable.com/article/how-to-make-instagram-private/