We Love Arizona!
The social network wants to make it easier for users to find content already on Facebook, and functional hashtags are the first step. According to Facebook, many users already post hashtags anyway, so why not make them work. Hashtags will be both clickable and searchable, so, for example, topics like #NSALeaks or #NBAFinals will now exist.
Hashtags from other services, such as Instagram, are clickable as well. Users will also be able to compose posts directly from a hashtag feed and search results. That could make adding real-time content to specific streams easier than before.
Twitter user Chris Messina created in 2007 the hashtag as we know it today. Twitter eventually adopted the system of organizing tweets around a certain subject into its API and its broader ecosystem. Since then, the hashtag has been adopted by other services, including Flickr, Tumblr, Google+ and even Facebook-owned Instagram.