All of us have heard the word “hashtag” a lot. Maybe you even have used it. But do you know what is the hashtag is? The hashtag symbol or pound sign (#) precedes a word or phrase to identify messages on a specific topic and to categorize those posts and help them show more easily in Search.
Twitter was the first social network began to use Hashtags in 2009 and to hyperlink all hashtags in tweets to Twitter search results for the hashtagged word. Then it introduced “Trending Topics” on the Twitter front page, displaying hashtags that are rapidly becoming popular.