Search Analytics is a free tool to show how your keywords rank and the visits they generate to your site through time. Google has built this tool since with the growth of Not Provided Keywords almost all organic search traffic is now encrypted, making it impossible to see in the original Google Analytics SEO reporting which keywords from Google are driving visits and converting. This led to a resurgence in the popularity of rank checkers which Google has alway discouraged. It shows keywords through time, but only for the last three months. Unfortunately it does not provide long-term analysis. Analytics tools are most useful when you can do year-on-year comparisons that take seasonal changes into account - this isn't possible at the moment. Get the full story at Smart Insights