Social Media 6 years of hashtag history In under a decade, hashtags have gone from altogether non-existent to appearing in half of all Super Bowl commercials. Follow the progression. By Abbi WhitakerNov. 18, 2013 SHARE Ragan Insider Premium Content To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.