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A hashtag is a great way to bring people together around a topic on Twitter (Twitter reviews) – just add a hash symbol (#) to the front of a word and encourage others to add it to their tweets about the same topic. Everyone can easily find these tweets by searching for the hashtag on Twitter Search. Twitter memes like #SXSW helped Twitterers follow conference activities and events both on the ground and from afar, but for the most part, people all but stopped using the hashtag once SXSW was over.
