Google Supplemental Index Ratio is a search engine optimization (SEO) software tool that finds out the number of supplemental and main Google indexed pages for your site. This tool gets you the answer on the question: What is the Supplemental Index Ratio for my Website? Read more

Google Supplemental Index Ratio

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What Is The Supplemental Index?

The Supplement Index is one of most important SEO concepts. It is a secondary index for pages considered by Google of less importance. Web pages found in the supplemental index have the high chance to be crawled less often and most probably will never be assigned PR. As a result, these pages tend to disappear from the organic search results. This is the reason because the Supplement Index is often called as "Google Hell". The Supplemental Index Ratio points out on percentage of pages indexed from your website are supplemental results. Therefore the lower your website Supplemental Index Ratio is, the better.

The main reasons why web pages fall into the supplemental index are as the following:

• Low quality or duplicated content
• Backlinking from a bad neighborhood
• Excessive reciprocal links