Hashtag is a relatively new word. It was first used in 2007 as a simple user based innovation (#barcamp) useful for the organisation of content on Twitter. Since then it has enjoyed a rapid spread (#sandiegofire) on Twitter, across other social media and far beyond. In 2010 ‘Trending topics’ were introduced on Twitter based on the most popular hashtags. In 2012 ‘Hashtag’ was selected as the Word of the Year by The American Dialect Society.