The Twitter Hash Tag: What Is It and How Do You Use It?
The shortest and most complete explanation of Twitter’s hashtags I found to date:
It took me a while to wrap my head around what the purpose of this thing was but, once I “got it,” I realized it’s not as complicated as it seems. A hash tag is simply a way for people to search for tweets that have a common topic.
~ by WPA Staff on March 16, 2010.