What are #hashtags?

I’ve seen it asked on Facebook before. What’s up with the # signs in people’s posts?  The response: It’s a twitter thing.

In case that’s not a good enough answer for you, here’s a quick rundown on the elusive # symbol.  In Twitter terms it is called a hashtag.  What does it mean, when used before a keyword in a tweet, the word becomes a link to search results for all Tweets containing said #hashtag in the message.

They can use used many different ways: to add emphasis, to give context, or generally to make a post richer and more interesting.

#wantmore? Read this artlcle in the New Yorker. Susan Orlean is a much better writer than I am.