Yoast has written a fantastic tutorial on rel=canonical links. This has always been a bit on a confusing subject to me, but thanks to this post I now feel like I can make use of this powerful SEO feature.
HowDoItKnow.net runs on the Genesis Framework
Genesis empowers you to quickly and easily build incredible websites with WordPress. Whether you're a novice or advanced developer, Genesis provides the secure and search-engine-optimized foundation that takes WordPress to places you never thought it could go. It's that simple - start using Genesis now!