What Is a Hashtag

Using hashtags on Twitter

Definition: The # symbol, called a hashtag, is used to mark keywords or topics in a Tweet. It was created organically by Twitter users as a way to categorize messages.

Using hashtags to categorize Tweets by keyword:

• People use the hashtag symbol # before a relevant keyword or phrase (no spaces) in their Tweet to categorize those Tweets and help them show more easily in Twitter Search. 
• Clicking on a hashtagged word in any message shows you all other Tweets marked with that keyword.
• Hashtags can occur anywhere in the Tweet – at the beginning, middle, or end.
• Hashtagged words that become very popular are often Trending Topics.

I have seen hashtags everywhere and now i know what they are. I think its a great invention maybe we could apply it to other things.