SEO traffic is nothing but traffic that your website receives from organic* results. Tracking SEO traffic will give you a good idea about the effectiveness of your SEO plan.
Some of the ways by which you can track traffic to your website are –
You may also want to refer to some of the SEO articles in this site for SEO information that might help your website in attracting more SEO traffic.
*Organic results mean the traffic that comes to your website only by means of Search engine optimization, as. in… without using paid services. Typically you will find the organic results here, the part that is circled contains organic results –