Who created hashtag? In August 2007, Chris Messina ’s a twitter users and a social technology expert created the first hashtag as a way to group information. (Doctor Vanessa). In his first hashtag, Messina says: how do you feel about using # (pound) for groups. As in #barcamp [msg]? (See image One). Perhaps every word with the hash in front means is connected to a link. What is Hashtag? “Hashtag (#) is the hash character number sign in front of a combination of words added to a tweet and creating to track categories, groups, or topics. “Others can use to search for info using the Twitter Search feature. (Donna Ghunter). When to use Hashtags ? Similar to Google, hashtags can be used for a search on a topic. For example when a new movie coming up, a hashtag should be designed immediately to provide necessary info such as trailers, actors, and date. “One of the most common uses of the hashtag is to tweet what's happening at an event or conference. The event organizer will