You've probably already seen hashtags on Facebook even though, until now, they served no practical purpose. But on June 12, Facebook announced it would introduce hashtags to its platform to facilitate public conversations.
"Starting today, hashtags will be clickable on Facebook. Similar to other services like Instagram, Twitter, Tumblr, or Pinterest, hashtags on Facebook allow you to add context to a post or indicate that it is part of a larger discussion. When you click on a hashtag in Facebook, you'll see a feed of what other people and Pages are saying about that event or topic."
Previously, Twitter dominated the real-time conversation market and other media has caught on. You can hardly watch a show these days without being encouraged to Tweet about it. Conferences, brands: they all have their own hashtags, and Facebook wants in on that action. It also allows you to control the audience for your hashtag posts. Most interestingly, the post alludes to more developments to come.