One of the best ways to find relevant posts and people to follow on Instagram is to look at what’s tagged with keywords or phrases that interest you. Instagrammers use hashtags to categorize their posts, so you can search for hashtags you like to find content you’ll enjoy. If you want to follow that hashtag, follow it just like you would follow an Instagram account.
How hashtags REALLY work (tested)
Quickly and easily visit the Instagram Explore page to find new content using your favorite hashtags.
Open the Instagram app and select the magnifying glass from the bottom menu.
Tap Search at the top of the Explore page.