Social network giant Facebook is incorporating hashtags into its service, according to The Wall Street Journal. The news is surprising, as the hashtag is a feature made popular by Twitter.

Like Twitter, Facebook is to use hashtags, a "#" symbol followed by a word, to categorise conversation. For example, tweets (and in the future Facebook updates) pertaining to a certain event, like the Galaxy S4 launch, could include the phrase #galaxys4. It is also used on Tumblr, Facebook-owned Instagram, and Google as way to group messages.

Twitter began hyperlinking hashtags in July 2009 and now uses them in the Trending Topics section on the Twitter front page. The Wall Street Journal didn't provide specific information on how Facebook would implement the feature. We presume it will be similar to how it is used on Instagram, as a way to group photos into categories.

No word on when the feature may be available. The company told Pocket-lint in a statement: "We do not comment on rumor or speculation."