This one is all about engagement. I’m not sure if it’s now common knowledge, but only 4-6% of your followers see your posts.
I have found the best way to up this engagement is to have interaction in Instagram before you post and right after you post. I heard one Social media guru put it in these terms
You need to warm up insta before you post then immediately comment back and like comments made on your post.
This will up your posts engagement and more of your followers as well as hashtag followers will see and interact with you.