Saves
Why it matters for creators
A like costs nothing and means little. A save is somebody deciding they will want this again, which is a much harder thing to earn and a much better read on whether the content was actually useful.
For anyone testing what to make more of, saves are the most honest metric in Insights. They correlate with the content being referenceable — playbooks, breakdowns, anything with steps or numbers — rather than with the content being agreeable. Two posts with identical likes and very different save counts are not equally good posts.
Saves are also a useful predictor for a DM funnel. A post people bookmark is a post whose subject they want more of, which makes it a strong candidate for a keyword offer: the audience has already told you the topic has pull. Instagram does not report who saved a post, only how many, so it is a signal for what to make rather than a list to act on.