When you the URL or link address of the web page or website, the SEOmoz Page Strenght Analysis Tool will retrieve some data about the website from various source and then process the date in order to calculate the page strenght. The data includes:
- Links pointing to full URL
- Links pointing to domain
- Position at Google for first four words of title tag on target URL
- Age of Domain
- Links from domains with .edu TLDs
- Links from domains with .gov TLDs
- Alexa Rank
- Domain name visibility
- Internal Link Percent
- Number of search results for URL search at del.icio.us
- Listings in DMOZ (ODP)
- Links found in Wikipedia
- Google Pagerank of full URL and Domain
So it’s the data analysis is pretty intensive, but the Page Strenght may not reflect your actual standing in search engine as the calculation, after all, is from SEOmoz and not from the search engines themselves, although it may comes close. Anyway, with SEOmoz Page Strength tool, you can have a glance of most important indicators about your website on one single page.
SEOmoz Page Strength (now Moz Analytics and no longer free)