This week marks the 10 year anniversary for Twitter’s hashtag, one of the most recognizable symbols in the world. The hashtag came into existence in 2007, with a tweet by Chris Messina, a web marketing specialist,  and eventually caught on across the platform.
Twitter is celebrating the milestone with a special hashtag, #Hashtag10. The company’s co-founder, Biz Stone, wrote about the hashtag’s origins and where it was originally mentioned.
According to Twitter, a hashtag—written with a # symbol—is used to index keywords or topics on Twitter. This function was created on Twitter, and allows people to easily follow topics they are interested in. This is also a data-feast for marketers, advertisers and analysts alike, since people are willingly creating databases they can dive into.
People use the hashtag symbol (#) before a relevant keyword or phrase in their Tweet to categorize those Tweets and help them show more easily in Twitter search. Also, clicking or tapping on a hashtagged word in any message shows you other Tweets that include that hashtag.
Hashtags can be placed anywhere in a Tweet. Hashtagged words that become very popular are often Trending Topics.  According to Evening Standard, some of the most popular Twitter hashtags are #BlackLivesMatter, #TheDress, #HeForShe, #IceBucketChallenge, #brexit, #funnycat and #Superbowl.
Here is the first tweet with a hashtag ever:

Today we’re living in a world where almost everything is digital, and even the way we express ourselves is starting to be shaped by the opinion of others on Social Media and on the Internet in general. So symbols are emerging as something deeper than easy ways to transpose our thoughts into words, without actually typing full sentences. They have the power to tell a story about our personality, social status, wealth and so on.
After you type the hashtag sign, everything is possible: you can be whoever you want, wherever you want with whomever you like. The hashtag is nowadays used by almost everyone, no matter their position or social status. Presidents (especially our President), analysts, marketers, comedians, actors, musicians, scientists, news publications and everyday people use it, united under a common goal, idea or simply by a passing trend.
Read below the story of Twitter’s hashtag symbol, written by Biz Stone:
The hashtag was born on Twitter 10 years ago today, and it has become one of the most recognizable and widely used symbols of our time. Here’s how.
In the summer of 2007, a web marketing specialist and avid user of Twitter, Chris Messina walked into our grungy office at 164 South Park (yes, people would just walk in back then) and made a suggestion to me and a few other Twitter employees who were sitting nearby. We were working frantically to fix a tech issue that had brought Twitter down, as was often the case in those early days.
Many iconic features of Twitter have been created over the years by listening and watching what people who use Twitter do with it and then working to make it easier and better for them—we still do this today. Back in those early days, Jack and I even published our phone numbers on the front page. So, although we were somewhat frenzied, we wanted to give Chris a few minutes and hear him out.
His proposal was simple, useful, and fun—just like Twitter. Because brevity is essential on Twitter, he suggested using the “pound” or “hash” character common on phones (this was pre-iPhone) to create groups of related Tweets. It was an undeniably elegant proposal, but I really needed to get back to work. I turned back to my computer screen to help get Twitter back up and running, hurriedly ending the conversation with a sarcastic, “Sure, we’ll get right on that.”
Thankfully, Chris didn’t take offense to my reaction, he simply started doing what he had proposed. On August 23rd, 2007, the hashtag came into existence with this Tweet and eventually caught on across the platform. We hyperlinked hashtags on Twitter making them easier and better for all.
Since it first appeared on Twitter, the hashtag has dramatically evolved — from grouping Tweets, to adding quirky commentary, to sparking social movements and global conversations. Using hashtags on Twitter, people worldwide have made this platform their microphone, shaped culture, and changed the world.
Combined with the power and influence of Twitter, the hashtag empowers everyone to see what’s happening in the world and what people are talking about. It allows people from all over the planet to share their voice and join global conversations. When something happens in the world, it happens on Twitter.
Happy tenth birthday, hashtag. We’re glad we never called you by your technically correct name, “Octothorp.”

About the author

Sebastian Stan

Sebastian is a journalist and digital strategist with years of experience in the news industry, social media, content creation & management, and digital analytics.