The hashtag, which emerged organically among users on Twitter as a way for people to collect tweets on a favorite topic, has become the hallmark of Twitter. Twitter shows tags that are trending and clicking on a hashtag brings up other posts with the same tag. Facebook plans to use the hashtag similarly by using it as a way to group conversations. Hashtags have been shown to have the potential to generate ad revenue on Twitter, as advertisers can pay to promote their own hashtags.
The social media giant Facebook seems to be inching closer to Twitter in more than one way. Recently, Facebook changed the name of its “Subscribe” button to “Follow” and also renamed subscribers to followers. This tweak came after Facebook built its own button similar to Twitter’s Follow button. Facebook also began allowing people to tag celebrities and brands with the "@" sign. The site's recent redesign allows users to further personalise their news feed so that they can more easily find the information they want.