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I know of Alexa and some people find the information useful for ranking a website... as for me, no matter how big or small my sites are, none of them are registered with stats on them, and a few clients are disappointed with me over it.
- How much influence does Alexa have on website's worth?
- Why do people hold it's stats so highly over content of the actual site in question?
- Should I actually worry about Alexa Ranking?
All of the stats which I do worry about is what Google Analytics, Webmasters Tools, and Piwiki on my server tells me. Usually I can gauge how good or bad I am doing with those alone for what sections of the site is active and which is not receiving traffic for the purpose of my content.