I just tried to send someone to Google’s own definition of Supplemental Results, and find that all references to them have been removed from Google’s help files. Why would that be?
Looking at Google’s cache of their own site, I see that until recently, they said this:
What’s a “supplemental result?”
A supplemental result is just like a regular web result, except that it’s pulled from our supplemental index. We’re able to place fewer restraints on sites that we crawl for this supplemental index than we do on sites that are crawled for our main index. For example, the number of parameters in a URL might exclude a site from being crawled for inclusion in our main index; however, it could still be crawled and added to our supplemental index.If you’re a webmaster, please note that the index in which a site is included is completely automated; there’s no way to select or change the index in which a site appears. Please also be assured that the index in which a site is included doesn’t affect its PageRank. For tips on maintaining a crawler-friendly site, please visit our Google’s Webmaster Guidelines
Why do you suppose they would remove it?
This is the URL that the information was on before, and the one that comes up in the results pages…