Hashtags are an important way to expand your social media audience and get more reach. When you use a hashtag, your post will appear on the page for that hashtag.
 
People can also choose to follow hashtags, which means they can see your posts in their feed even if they don’t follow you (yet).
 
If you use a hashtag on your Story, it could be included in the relevant hashtag Story, which also appears on the hashtag page.