What is Keyword Proximity?

Keyword proximity is the combination of the density of a keyword and the prominence. So proximity looks at the location of the keyword in the sentence and how often it's being used in that sentence and also takes into account the distance between them.

Supplemental Index Ratio Calculator

What is the Supplemental Index Ratio?

Google has a secondary index containing pages pages considered of less importance.
This pages are considered supplemental results, and returned in SERPs only if there are no pages from the main index matching the given search term(s).

The Supplemental Index Ratio tells you what percentage of pages indexed from your website are supplemental results.
The lower your Supplemental Index Ratio is, the better.

Calculate your Supplemental Index

How does a page go supplemental?

From my experiences pages have typically gone supplemental when they became isolated doorway type pages (lost their inbound link popularity) or if they are deemed to be duplicate content. For example, if Google indexes the www. version of your site and the non www. version of your site then likely most of one of those will be in supplemental results.

If you put a ton of DMOZ content and Wikipedia content on your site that sort of stuff may go supplemental as well. If too much of your site is considered to be useless or duplicate junk then Google may start trusting other portions of your site less.

What are supplemental results? in SEO ?

Supplemental results usually only show up in the search index after the normal results. They are a way for Google to extend their search database while also preventing questionable pages from getting massive exposure.

What is Google Penguin

It is advanced terms of Google Panda designed to find out those websites which are integrated with improper hyper and inter links, or where content integrates useless stuffing of keywords with requirement in content.

What is Google Panda

It is the technique that is adopted by the Google search engine to remove the contents of website which are placed at low rankings or which do not provide appropriate information to its visitors.