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Why I Love Google's Supplemental Index 
By: Aaron Wall 2007-05-07 Forbes recently wrote an article about Google's supplemental results, painting it as webpage hell. Forbes recently wrote an article about Google's supplemental results, painting it as webpage hell. The article states that pages in Google's Supplemental index is trusted less than pages in the regular index: Google's programmers appear to have created the supplemental index with the best intentions. It's designed to lighten the workload of Google's "spider," the algorithm that constantly combs and categorizes the Web's pages. Google uses the index as a holding pen for pages it deems to be of low quality or designed to appear artificially high in search results.Matt Cutts was quick to state that supplemental results are not a big deal, as Rand did here too, but supplemental results ARE a big deal. They are an indication of the health of a website. I have worked on some of the largest sites and network of sites on the web (hundreds of millions+ pages). When looking for duplicate content or information architecture related issues, the search engines do not allow you to view deep enough to see all indexing problems, so one of the first things I do is use this search to find low quality pages (ie: things that suck PageRank and do not add much unique content to their site). After you find some of the major issues you can dig deeper by filtering out some of the core issues that showed up on your first supplemental searches. For example, here are threadwatch.org supplemental results that do not contain the word node in the URL. If you have duplicate content issues, at best you are splitting your PageRank, but you might also affect your crawl priorities. If Google thinks 90% of a site is garbage (or not worth trusting much) I am willing to bet that they also trust anything else on that domain a bit less than they otherwise would, and are more restrictive with their willingness to crawl the rest of the site. As noted in Wasting Link Authority on Ineffective Internal Link Structure, ShoeMoney increased his search traffic 1400% after blocking some of his supplemental pages. Comments Tag: Google About the Author: Aaron Wall is the author of SEO Book, a dynamic website offering marketing tips and coverage of the search space, free SEO videos, and free SEO tools. He is a regular conference speaker, partner in Clientside SEM, and publishes dozens of independent websites. |
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