Glossary keyword - Supplemental Result

Supplemental Result

A supplemental result is any URL located in the supplemental index of Google.  These URLs do not usually form part of Google’s search rankings. Thus, they are only displayed in search results if Google fails to find sufficient results in its main search index. Therefore, the supplemental index is Google’s secondary database. Where less essential pages, according to PageRank’s criteria, are contained. These help Google to prevent questionable URLs from gaining massive views while also maintaining an extensive search database. Hence, sites deemed as less credible and sometimes inactive go into the supplemental database.

Becoming a Supplemental Result

Usually, pages become supplemental when they lose the popularity of their inbound links. Or, if they contain duplicate content. For instance, should Google bots index the non-www. version of your site and the www. version of the same site, it's highly possible one of these versions will become a supplemental result. In another sense, if your site has a lot of Wikipedia or DMOZ content, it also likely such pages will join supplemental results. Overall, Google begins to trust your entire site less when too much of your web content is duplicate or junk. They would ultimately end up in the supplemental database.

How to Leave Supplemental Results

Often, Google adds and removes pages from their supplemental database. So, maybe waiting for a while may solve your problem if you’ve recently joined supplemental results. Nevertheless, you need to check for errors like content plagiarism and duplicate content, product URL rotations, and other content management errors. Usually, Copyscape does a great job of detecting and bringing up duplicate web pages on the internet. Also, consider pointing more inbound links towards less popular pages of your website. Nevertheless, in 2007, Google made it public that they plan to discontinue the supplemental results index.

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