Hello,
What is Traffic rank in SEO?

Traffic rank is a ranking of your website versus all of the other websites across the internet (e.g., Google, Wikipedia, YouTube) in regards to the amount of organic traffic. While this ranking system is the basis of most traditional traffic rank tools, many of today's SEO tools take rank analysis a step further.

Traffic rank is a ranking of our website along with all of the other websites  to the amount of organic traffic.

Google traffic refers to the visitors who arrive at a website by clicking search results leading to that particular website. Using a Web analytics program, a website's overall search engine traffic can be segmented to show the percentage of search engine traffic for individual Web pages or site sections.

Alexa rank is calculated using a proprietary methodology that combines a site's estimated traffic and visitor engagement over the past three months.