Mashable had a post on Friday about Qwitter, a tool that sends you a notification when someone on Twitter unfollows you and lets you know which tweet (probably) caused them to unfollow you.

For personal use, I can see how this tool could be an interesting. I am not too worried about who is following me and who isn’t, but certainly someone concerned with their personal brand could benefit from knowing when he or she has upset people on Twitter.

That brand monitoring is, to me, the most interesting part of this tool. More companies are getting into Twitter, and Qwitter (or something like it) could be help these companies get an idea of what sort of tweets engage people and which do not.

On Twitter, as with any social medium, nobody wants to be your friend just because they think your company’s cool. For the most part, anyway. You have to provide content that interests people, and the nature of that content really depends on who you are and who you’re trying to reach out to.

A corporate Twitter account can’t simply be a blog feed. Someone has to pay attention to it, keep an eye on what followers are talking about, and keeping an eye on search results for new people tweeting about relevant subjects and responding to them.

As a corporate tweeter, you’re not going to be in the business of saying offensive things, but Qwitter can help you find out when people simply give up on you and unfollow you. It’s another way of getting feedback for your social media campaign.

Lastly, this Qwitter appears to be something from “Qwitter, a Twitter-powered social tool designed to help people quit smoking” which appeared in the Twitter blog back in February.