How can I save posts I see on Instagram?
To save a post, tap 
below it. When you save a post, it's visible to you from a private section of your profile.
To save a post to a collection, tap and hold . Then, select a collection you've already created or tap 
To see posts you've saved and the collections you've created, go to your profile, tap 
Saved. Only you can see the posts you've saved. When you save someone's post, they're not able to tell that you've saved it.