Rebecca Zisser / Axios

Today is the 10th anniversary of the first Twitter hashtag. It was #barcamp, sent by former Google designer Chris Messina, in reference to a user-generated conferencing group he had helped create called BarCamp.

Why it matters: Hashtags have become a huge part of Internet culture and language. Jimmy Fallon and Justin Timberlake have famously spoofed Internet conversations via hashtag-only banter skits, and viral hashtags like #tbt (throwback Thursday) and #blessed have become integrated into everyday conversations in real life. Studies have suggested that nearly 3/4 of all internet users use hashtags to communicate. And hashtags have also spread to other Internet platforms, like Facebook, which adopted the feature in 2013.

Messina tweeted the hashtag as a recommendation for Twitter to create groups by automatically adding hyperlink metadata to any word that followed the "#" symbol. Twitter initially rejected the idea, saying hashtags were for "nerds," but eventually adopted the hashtag into its code in 2009.

New data from Twitter:

125 million hashtags are Tweeted per day on average.#ThrowbackThursday and #tbt have been Tweeted 120 million times and #ootd has been Tweeted over 2 million times.Five of the most-used hashtags over the past decade originate from fans tweeting during award shows. #MTVHottest, #MTVStars, #KCA, #iHeartAwards and #BestFanArmy have all been used over 3 billion times.The most Tweeted television show hashtag of all time is #TheWalkingDead and the most Tweeted about movie hashtag of all time is #StarWars. The most Tweeted global sporting event hashtag is the #WorldCup and The most Tweeted US sporting event is the #SuperBowl. The most Tweeted about league hashtag is #NFL and the most Tweeted team hashtag is #MUFC.

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Coronavirus dashboard

Illustration: Eniola Odetunde/Axios

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Scoop: Mike Bloomberg's anti-chaos theory

CNN's Anderson Cooper questions Joe Biden last night at a drive-in town hall in Moosic, Pa., outside Scranton. Photo: CNN

Mike Bloomberg's $100 million Florida blitz begins today and will continue "wall to wall" in all 10 TV markets through Election Day, advisers tell me.

Why it matters: Bloomberg thinks that Joe Biden putting away Florida is the most feasible way to head off the national chaos we could have if the outcome of Trump v. Biden remained uncertain long after Election Day.

Biden's hardline Russia reset

Photo Illustration: Eniola Odetunde/Axios. Getty Images photos: Mark Reinstein

When he talks about Russia, Joe Biden has sounded like Ronald Reagan all summer, setting up a potential Day 1 confrontation with Russian President Vladimir Putin if Biden were to win.

Why it matters: Biden has promised a forceful response against Russia for both election interference and alleged bounty payments to target American troops in Afghanistan. But being tougher than President Trump could be the easy part. The risk is overdoing it and making diplomacy impossible.