Instagram has a new feature rolling out this week to enhance the current tool that enables saving other users' posts:
Starting this week, you can save posts into private collections. Tap and hold the bookmark icon underneath any post to save it directly to a collection. You can create and name a new collection when you save a post, or you can add it to one you’ve already created. You can also create a collection out of your existing saved posts. Tap the plus icon in the top right corner, give your collection a name and select the saved posts you’d like to add.
You can find your collections on the saved posts tab on your profile. Just like all saved posts, your collections are private — only you can see them.
While some of Instagram's biggest new features of late have appeared focused on targeting Snapchat, the ability to save and organize posts into collections brings Instagram closer into Pinterest's space. Although all collections of saved posts are private at the moment, it wouldn't be too surprising to see a future option to make select collections public.