What ranking does Alexa Top Sites provide for web sites?

Alexa Top Sites offers a ranking system known as the Alexa Traffic Rank. This metric reflects the estimated average daily unique visitors and pageviews for a website over a period of time, typically taking the previous three months into account. By analyzing web traffic data from individual users who have the Alexa toolbar installed, Alexa provides a comparative ranking that allows users to see how a website performs against others in terms of popularity and audience reach. This is particularly useful for businesses, content creators, and marketers who want to gauge their site's performance in the digital landscape.

The other options reference different metrics or characteristics that may be important to web performance or analysis but are not part of what Alexa Top Sites directly ranks. SEO performance involves a broader scope of optimization techniques and outcomes, user engagement metrics focus on how visitors interact with a site, and revenue estimates relate to financial performance. None of these are the specific ranking system provided by Alexa, which is solely dedicated to traffic estimations.