Chris Messina, who suggested in 2007 that Twitter start using hashtags to group tweets, has said goodbye to the platform.

The hashtag has been trending all day in the United States. A highlight of the diverse faces of people from the social media campaign #BlackOutDay. Twitter images clockwise from top left: ...

How did the popular social network get some of its core features? July 15, 2012 — -- We know what you are thinking: Wait, didn't Twitter just celebrate its sixth birthday? How is it now ...

To commemorate tonight's start of the 2017-18 NHL season, each of the 31 NHL teams will have an official hashtag-triggered emoji, the National Hockey League (NHL) and Twitter announced today. While ...

Black Twitter was a force to be reckoned with in 2014. We saw the calling out and subsequent firing of people who posted racist tweets, as well as meaningful calls to action in which social activists ...

Politicians and political watchers alike are trying to capitalize on Twitter's once straightfoward hashtag symbol. In a fun essay at TheAtlantic.com, Nancy Scola notes that the hashtag (the # symbol) ...

X, formerly known as Twitter, is working on a new feature that will allow group admins to pin hashtags within a Community. This would presumably help organize the community better by creating ...

The Proud Boys hashtag, which members of the far-right group have been using, was trending Sunday after gay men on Twitter hijacked it and flooded the feed with photos of their loved ones and families ...