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Possibly a really stupid question. Is Page Rank logarithmic or exponential? I've seen a lot of people talking about Page Rank saying it's logarithmic but when they describe it they're actually talking about an exponential scale. (Apologies if I'm showing a basic misunderstanding in mathematical knowledge - I studied Drama)

One of my sites is installing Strange Loop, a front end content optimisation platform. Does anyone have any advice when dealing with this type of implementation or pitfalls that I need to look out for. Even just a headsup on some reading material would be good. Thanks

I keep getting the "Googlebot found an extremely high number of URLs on your site" message in the GWMT for one of the sites that I manage. The error is as below- Googlebot encountered problems while crawling your site. Googlebot encountered extremely large numbers of links on your site. This may indicate a problem with your site's URL structure. Googlebot may unnecessarily be crawling a large number of distinct URLs that point to identical or similar content, or crawling parts of your site that are not intended to be crawled by Googlebot. As a result Googlebot may consume much more bandwidth than necessary, or may be unable to completely index all of the content on your site. I understand the nature of the message - the site uses a faceted navigation and is genuinely generating a lot of duplicate pages. However in order to stop this from becoming an issue we do the following; No-index a large number of pages using the on page meta  tag. Use a canonical tag where it is appropriate But we still get the error and a lot of the example pages that Google suggests are affected by the issue are actually pages with the no-index tag. So my question is how do I address this problem? I'm thinking that as it's a crawling issue the solution might involve the no-follow meta tag. any suggestions appreciated.