LONDON - JULY 02: In this photo illustration the Twitter website is displayed on a laptop computer on July 2, 2009 in London. The social network site, started in 2006 in California as a sideline project, has grown into a global brand becoming one of the fastest growing phenomenas of the Internet. (Photo by Peter Macdiarmid/Getty Images)
Facebook wants the hashtag.
Facebook is using the mark, most well-known in the Twitterverse, to group conversations, according to the Wall Street Journal. However, don't expect it to show up on your Facebook news feed immediately because the social network is still testing the hashtag, or word or words preceded by #.
The hashtag is probably most associated with Twitter, but that won't stop Facebook from using what has now become synonymous with associating an update or post with a subject. Facebook will use the hashtag to index conversations likely because the hashtag is used a lot on Instagram, which the social network bought last year.