The problem with Twitter, is the fact that it’s difficult to track backchannel information without filtering through a lot of garbage. In fact, it’s a rather pain in the rear.
But with #hashtags, life is a lot simpler. Basically the idea is to add the bot as your friend. What it does, is that it tracks any Twitter that is made with the # tag. So if you tag something with the hash mark, then anyone else that also does the same will immediately have theirs threaded together under the hashtag.
It’s a rather simple but effective concept in making Twitter way more useful.