Can we really get a fair gauge of how our website ranks by using tools like Alexa?
Here is a good article
how important is pagerank?
When Google was in its childhood, PageRank was the single most important factor for ranking well. However, as soon as the SEO community caught on to this, there was a great deal of people who found ways to artificially boost their clients' PageRank. Those sites became more authoritative than Google thought they should be. Since then, Google and other search engines have constantly refined how important PageRank is, and its importance has definitely declined through the years.
One tactic Google uses is to update Google Toolbar PageRank values four times a year instead of every week, making it difficult for SEOs to know a site's real PageRank. Another tactic is to prevent a site that has been known to sell links from passing any of its PageRank (authority) on to sites that it links to. However, Google can't use that tactic too much because then they run the risk of preventing good sites from being ranked as they should be.
This is a battle between Google and SEOs that will not be ending anytime soon!
where do i get pagerank for my site?
Now we've come to the part where you actually have to do work! It's tough, but getting a high PageRank for your site should definitely be part of your longterm SEO strategy.
The only way to get PageRank is to get a link from a site that already has PageRank. This means that getting a ton of links from PageRank 0 sites will not help your score. However, a single link from a site with a PageRank 6 can immediately boost your site to a PageRank 5 if the site is trusted by Google and is not linking to a massive amount of other sites.
The process of increasing your PageRank is directly tied to link acquisition. Link acquisition is getting links from other sites, be it via natural or through link purchasing. We cover both of these topics in greater detail, and you should read each lesson to learn more about the benefits and drawbacks of each.
final thoughts: pagerank
Although not nearly as important as it used to be, PageRank can still be the deciding factor that bumps your site to the top of the search engines. Not only that, but it is also a good indicator of which sites you should spend your most time trying to get links from. Sites with a PageRank 0 are either being punished by Google, or just have an authority of zero, nada, zilch, bupkis, and generally not worth your time.