Rank better on Google
Since April 2010, Google has been treating site speed as one of the signals they look at in their search ranking algorithms. Faster websites are rewarded by Google with higher rankings and therefore, more traffic. You can read Google's official announcement
where they explained why they were making the change. If your Google ranking is important for your site, speed is one of the easiest things you can improve.
How Torbit can help make you fast
The good news is you don't need to optimize by hand. We're here to help. Site Optimizer
customers often report that an improvement in their Google rank is one of the first things they notice after using Torbit. « More pageviews Happier visitors »