what is a hashtag on twitter? Do you have to put a # in front of it and does it matter where it goes?

[twitter expert]

Hashtags are a community-driven convention for adding additional context and metadata to your tweets. They're like tags on Flickr, only added inline to your post. You create a hashtag simply by prefixing a word with a hash symbol: #hashtag.

hashtags.org provides real-time tracking of Twitter hashtags. Opt-in by following @hashtags to have your hashtags tracked.

It doesn't matter where you put it in your tweet while you need to use # infront of the word. example : #twitter

Check out http://twitter.pbworks.com/Hashtags for detailed use and tips.

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