1. #Hashtag research = keyword research
Just as people had to learn how to search using traditional search engines like Google and Yahoo, people are learning how to better search social media sites like Twitter. Increasingly, they are using hashtags. A hashtag is simply including the # symbol in front of a keyword. For example #diabetes . People can subscribe to follow hashtags or they can search for them, allowing them to stay current on specific topics, and recently Twitter began hyperlinking hashtags within tweets allowing people to go diretly the search results for that hashtag instantly.
By researching which keywords are popular at the moment, you craft messages that are relevent and timely, and by including the hashtag in your post, you expand the reach of your tweet beyond your follower list, which leads us to…
2. # of followers you have
The more followers you have, the more likely the content you post will be seen (found).
Your number of followers measures your immediate audience on Twitter. It’s a way to measure the opportunity each of your tweets has to reach and engage your audience.
TwitterCounter allows you to measure and compare your profile against competitors (or friends
Here we can see that Bing has more followers than Yahoo; and it’s growing it’s follower count faster than Yahoo.
3. # of clicks on the links you post on Twitter
Linking to relevant content within your tweets adds value to other users, and by utilizing URL shorteners with tools like Tweetburner you can measure how engaged people are with your tweets by tracking the number of clicks on the links you post.

