The #hashtag turns 10: Twitter's global brand strategy head on lessons learned

On August 23, 2007, user Chris Messina used the first hashtag on Twitter #Barcamp. Today, an average of 125 million hashtags are tweeted per day.

5 ways the hashtag influenced our culture


10 hashtags that defined the decade

From #MAGA to #Maythe4th, here are some of the biggest hashtags of the first 10 years of the hashtag.

Gloves Off: Is the hashtag still relevant for brands?

As Twitter's hashtag celebrates its 10th anniversary, PRWeek reporters spar over whether it's still necessary for brands.

8 hashtag fails brands can learn from

Twitter. Never. Forgets.