New York • Facebook is introducing hashtags, the number signs used on Twitter, Instagram and other services to identify topics being discussed and to allow users to search for them.
Facebook Inc. said in a blog post Wednesday that users will be able to click a hashtag to see a feed of discussions about a particular topic. For example, typing a number sign in front of "ladygaga" or "sunset" will turn the words into a link that users can click on to find posts about those subjects.
Facebook said hashtags are a first step toward making it easier for users to find out what others are discussing. The company is not giving exact details about other tools it might introduce. If Twitter's use of hashtags is any indication, Facebook probably will incorporate them into its advertising business.