I usually check my site up at SEO Site Checkup. Now, my site isn't top-notch, and I don't expect it to have a high PageRank, but SEO Site Checkup says the PageRank is unavailable for my site (that's different from a PageRank of 0 or 2...).
What does "unavailable" mean in this case, and how do I achieve a PageRank number?
Here's a screenshot:
By the Way: My sitemaps have been submitted to Google, I didn't receive any messages in Webmaster Tools, and my webpages have been indexed by Googlebot.
If you search
site:example.com in Google for example, you get results from my site, meaning that my site is indexed. It's just that it never appears in real, natural searches (not
site: based ones), and my PageRank is listed as "