Facebook hashtags are a great feature to connect people who are talking about the same topic or looking for a similar topic. In addition, it helps in connecting the topic on different social media platforms add posts to a thread possibly created by the page owner or a trending topic.
Businesses need to use hashtags in a meaningful way and avoid using too many hashtags as a measure to improve the visibility of the posts. Experts recommend using a maximum of 4 hashtags that are relevant to the post (a good mix of branded and popular) and studies have proved that the lesser the number of hashtags used, the higher the interaction with the posts.
Just like how you would search for something on Google using keywords, like Twitter, Facebook has URL tracking to the hashtags. For example, if you use #NFL on the Facebook search bar, you will be directed to the page and you will be able to similar posts that had the same hashtag.