You can now use #Hashtags on Facebook
On June 12th, Facebook announced the integration of hashtags into their site.
Here’s an excerpt from the announcement:
“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.”
Like with mostly everything on Facebook , you will be able to control the audience that is able to see this the individual post. This feature is not available for individual tweets on Twitter (But you can make your entire account “protected” so that only your followers can see your tweets).
Here are some related links for further reading: