The Matter of Alexa Ranking

[michaeljordan81]

Page ranks that are determined by our site's performance and having a presentable rank can allow us to have a better access to the advantages that the internet has to offer nowadays. Such rank provides an impression to the marketing we're targeting telling them whether we are a site worth trusting and visiting. The ranks also provide an idea to the target market if we're worth spending for or not. On the other hand, this kind of confuses me as I know nothing about Alexa Rank. Can somebody in this forum give me a background about what this rank is all about?