A good way to know the traffic on your blog

I have been looking for a way to know the traffic on my personal blog. Fortunately, there is a website that provides the service for free. It is StatCounter. It provides a code that you can put in your blog, the code collect the traffic information from your blog. You can either display the number of visitors on your blog or not, all up to you. And you can check detail information after you log in with your accoutn on the website. It is really handy.