Alexa a tool to estimate website traffic and it ranks the various websites globally and regionally on the basis of traffic. Alexa has many tools which will assist you in improving your Content, SEO and paid search strategy. Alexa rank checker is one of the most popular. It is a free seo tool. Just add the domain name in text column and click submit you will get the global, regional ranking, regional code, and country code. The Alexa rank graph tell as global internet traffic and engagement over the past 90 days.