• Do I need to register my site to get Alexa stats?
• Does Alexa list subdomains separately from the domain?
• Does Alexa offer page-level data for websites?
• Estimated versus Certified metrics explained.
• Does Alexa offer unique visitor, visit, or pageview numbers?
• Why does Alexa say my visitors come from country X?
• Why don't Alexa's estimated metrics match up with my on-site analytics?
• Are there known biases in Alexa's traffic data?