Engine Optimization. In terms of Google, that means using a few key strategies to get your business higher on search results–so you show up on the first page of results instead of the fourth. For Instagram it's the same idea, but the tactics are a little different. To figure out how to use SEO to your advantage, you have to know how Instagram's algorithm operates.
Instagram's algorithm is a program that collects information about every single user on the platform. It processes data from every single photo, comment, hashtag, and reel that gets posted. It also collects information on what you like based on the content you engage with. Liking a post shows that you're interested in it; liking and commenting shows that you're interested even more.
So why is this helpful to know? Well, the algorithm figures out what each and every post is about–and therefore, to whom it would appeal. Now you can help it out a little bit.