What is a Tweet?
Users of the microblogging site Twitter periodically post short updates about whatever they're doing or thinking about. These little updates are called tweets. Tweets are limited to 140 characters. Because of the length constraints, tweets often contain hashtags and TinyUrls.
A hashtag is a word or phrase with the # symbol in front of it. Putting a # in front of a word broadcasts your tweet to people with specific interests. For example, including #NorahJones in your tweet will connect you with other Twitter users who are also interested in Norah Jones.
TinyUrls are shortened Web addresses. Websites likeTinyUrl allow you to make a very long Web address very short so that you can include an external link in your tweet but still have room for a short message to go with the link.
Twitter is becoming popular with those of all ages, because it allows users to quickly publish their opinions, contribute to polls on TV using hashtags, and follow popular users, like Niel deGrasse Tyson @neiltyson with over 1.6 Million followers. Although a tweet can be retweeted hundreds, millions of times, most tweets do not reach high exposure from most individuals.
Where Can I Learn More?
This short article explains hashtags and hashtag commands in more detail.