Twitter defines hashtags as the # symbol "used to mark keywords or topics in a Tweet. It was created organically by Twitter users as a way to categorize messages."
Hashtags are like tiny little links that make searching on Twitter easier. If you click on a hashtag, Twitter does a search and pulls up every other instance of that hashtag.
In April 2010, Twitter donated its entire digital archive of public tweets to the Library of Congress.
Given the fact that your tweets could be cataloged for future generations, you want to make sure you're using your hashtags correctly.
- Don't use a trending hashtag on an unrelated tweet. It's insincere and can easily loose you followers.
- Hashtags can be used to track weather, sporting events, conferences, etc.
- Try not to use more than 1 or 2 hashtags in a single tweet.
- Use camel case. Instead of posting #cliffsnotes use #CliffsNotes. The capitalization makes the hashtag easier to read.
- Try using hashtags to denote a specific tone. For example, "Yes, I love when I spill my hot morning coffie in my lap. #sarcasm."