Facebook hashtags could prove to be the savior of Graph Search, the recently launched Facebook search feature.
Graph Search does what it promises—returns search results based on the social graphs of your Facebook friends, fans and followers. This means you tend to see search results only for those friends and businesses with whom you are already closely aligned.
If you use Facebook for outreach and marketing, the new hashtag feature will extend your reach dramatically. This will create both risks and rewards, so choose your hashtags with care.