Twitter hashtags
What’s a hashtag? On Twitter, it’s a tag preceded by a hash sign (#), and it’s a way to tag “tweets” (posts to Twitter) for aggregation. Amy Gahran has a useful post that explains “How to start a Twitter hashtag.” When you’re social tagging – i.e. trying to create a tag that others will use – it’ll be most useful if you get buyin. Says Amy, “Once you find a good, short, intuitive hashtag, start promoting it right away — to your Twitter followers, on your blog, in your media-sharing accounts (like Delicious, Flickr, and YouTube). Also, if you’re running the event, make sure you promote the event hashtag on the Web site, in e-mailed materials to attendees and media, and everywhere.”
