AlyssaS - 3:08 pm on Oct 20, 2011 (gmt 0)
Well here's a brief summary of that doc as it relates to spam:
(I'm pretty sure that pageoneresults was banging on about looking at your page in pure text mode, back in March, and kudos to him as that is how the raters look at things)
They then check for hidden text in CSS, in the blank areas and the far right of the page.
Re keyword stuffing, they also look for multiple mis-spellings of the words, keyword stuffing in the url.
With re-directs, they check the whois and domain registrants - if the page is being re-directed to another with the same owner, they think this is OK - it's the normal outcome of merging/upgrading websites. If the redirect is going to a page with another owner, they think this is doorway stuff.
They check for copied text, and text taken from feeds.
Finally, they give an example of a doorway page:
Hope this helps