Want to hide the fact that you’re online on Instagram? You might not have noticed this but Instagram has an Activity Status feature that shows if you’re online. If you’d rather not broadcast to your followers that you’re on the social network, you can easily turn that off. Just head to Settings and then scroll to the Privacy and Security section, and then pick Activity Status menu. There you can toggle the off button for Show Activity Status. Once you do this, the green dot beside your icon will disappear. One thing you need to note though is you won’t be able to see who is active either.
Source: Lifehacker