Supplemental Index

[shahab6]

What does Supplemental Index exactly mean? Some of my website are in Supplemental Index. Does that mean I won't be able to get a good rank in google?

[searchbliss]

From Matt Cutts:

In March, some people on WebmasterWorld started complaining that they saw none of their pages indexed in Bigdaddy data centers, and were more likely to see supplemental results.
- On March 13th, GoogleGuy gave a way for WMW folks to give example sites.
- After looking at the example sites, I could tell the issue in a few minutes. The sites that fit “no pages in Bigdaddy” criteria were sites where our algorithms had very low trust in the inlinks or the outlinks of that site. Examples that might cause that include excessive reciprocal links, linking to spammy neighborhoods on the web, or link buying/selling. The Bigdaddy update is independent of our supplemental results, so when Bigdaddy didn’t select pages from a site, that would expose more supplemental results for a site.

[wrmineo]

Taken directly from Google Help Center.

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 http://www.google.com/support/webmas...y?answer=35769