Twitter is marking 10 years since the hashtag was first used on the social media site by celebrating some of the most memorable uses of the digital symbol.
Former Google and Uber engineer Chris Messina first used the symbol as a way of tagging or categorising a tweet on August 23, 2007, when he suggested the symbol could be used to create group messages.
‘How do you feel about using # (pound) for groups. As in #barcamp [msg]? (sic)’, he wrote.
Happy 10th #birthday, #Hashtag!!
Credits: Julie Henderson via GifCities and Internet Archive, Metro