In case you’re not up on your social networking terms, a hashtag (a.k.a. pound sign, a.k.a. number sign, a.k.a. #) is a symbol used to make any term searchable. It started on Twitter in 2007 and has spread like wildfire ever since. What the HASH? Examples of How Hashtags Are Being Used #dentistproblems (career-based hashtags)…