Hashtags turn 10 years old (and counting)!
August 23rd 2007: Chris Messina suggests the use of hash character just as in IRC in this tweet:
how do you feel about using # (pound) for groups. As in #barcamp [msg]?
— ⌗ChrisMessina (@chrismessina) 23 agosto 2007
It took quite a bit, but in the end hashtags (and the hash character) took over as a metadata tag, helping Twitter (and many others as well) grouping news, aggregating topics and so on.
I can’t remind the very first time I used a hashtag in any of my social profile… can you?