A way that websites notify one another of where traffic is coming from is through the use of something called a “UTM code”. This is passed along in the URL when someone clicks on a link. Then software like Google Analytics or Adobe Omniture can generate reports around this UTM code to see how much traffic is sent to you from that source and what the Visitor has done on your site.
Since we have nearly doubled referral traffic to our dealers, we have added this UTM code to links to your website. You should be able to use your analytics software to see how much traffic and where those Visitors are going on your site. Talk to your website provider if you want to get more information.