Jacob Kastrenakes, writing for The Verge;
Instagram is launching a handful of new tools today to combat harassment and help its community members.
The first of those is much requested: the ability to limit who can comment on your photos. Instagram now gives everyone with a public account the ability to limit comments to only people they follow, only their followers, or both their followers and people they follow. Public and private accounts will continue to have the ability to turn off comments entirely, but it appears to still be on a post-by-post basis.
This will give your IG post some degree of privacy.
You can read Instagram’s full announcement here.