Getting SEO Information from Google`s Cache - Measure authority and website trust using the dates of Google's cache

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Google's cache date is, at least theoretically, the new Google Page Rank, according to Aaron Wall. For curiosity and a need for a proof, it would be easy to establish a scientific basis by gathering samples of Google cache date data and correlating it to Google Page Rank's measurement of importance.

Below are the results:

Based on the data provided above, authority and trusted websites are indexed frequently by Google when compared to less well-known websites. So Google cache data indeed reveals some information about Google's trust in your website.

If you're having a hard time understanding the data table provided above, see the correlation plot below between Google Page Rank and Google cache date:

It tells clearly that high PR websites are frequently indexed (hours last indexed value is small + difference = Date check - Google cache date) as opposed to low PR sites which are visited around 250 hours ago (or around 250/24 ~ 10 days ago) for a common PR 3 website.

Recommendations:

1. According to this study, Google Page Rank and back links are highly correlated. Then, according to the study above (between Google's cache date and Google Page rank), websites that possess authority and trust are frequently indexed, so it make sense to work hard on content that attracts quality back links.

2. Google Page Rank and Google cache date as shown in those studies does not directly translate to "good rankings," so if you are aiming for reputation and trust, you still need the "relevance" factor to rank well in Google.

The relevance factor involves the way your website presents content. Does it present content in such a way Google finds it relevant to a specific search query? Since you have the trust, ranking will be easy, especially if you have the relevance factor in your website.

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