Google Ranking Formula = {(1-d)+a (RS)} * {(1-e)+b (PR * fb)} * {(1-f)+c (LS)}

Where:

RS = RelevanceScore: (Score based on keywords appearing in Title, Meta tags, Headlines, Body text, URL, Alt text, Title attribute, anchor text etc. of your site)

PR = PageRank: (Score based on number and PR value of pages linking to your site. Original formula is PR (A) = (1-d) + d (PR (t1)/C (t1) + … + PR (tn)/C (tn)), where PR of page ‘A’ is the sum of the PR of each page linking to it divided by the number of outgoing links on each of those pages. ‘d’ is a dampening factor believed to be equal to 0.15)

LS = LocalScore: (Score computed from expert documents. Has variables and different values for search term appearing in title (16), headline (6), anchor text (1), search term density etc. Figures in parenthesis are the original values, which may have been changed by Google)

a, b, c = Tweak Weight Controls: (available to Google for fine-tuning the results)

d, e, f = Dampener Controls: (available to Google for fine-tuning the results. We believe that the value of ‘f’ is currently set at zero.)

fb = FactorBase: (The PageRank scale of 1 to 10 on Google bar is not linier but an exponential/logarithmic one. As per our internal analysis, we believe that it is a base ‘close to’ 8. This means that PR5 is 8 times more in value than PR4. As such, a PR8 website has a value 4000 times more than a PR4 website. This factor somehow needs to be built into the algo formula. We have therefore taken a fb value to accommodate this factor)

I hope you can get some useful information from it.

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Directory is considered to be the useful way for pagerank especially Dmoz; but few websites can be listed in Dmoz. If you were listed in Dmoz, you may find that the visitors increase and pagerank will be higher than before. It will bring you the benefit of it. So each webmaster want to be listed in it; but it is too hard for most of us, then you can try Yahoo paid directory, it also can do that; you just need to pay for some fee, and you will be listed in the list, it is great for you.

There are so many ways to do keywords optimization; but the most important is the link, such as the link anchor text. Put the keywords which you want to do optimization as the anchor text. It can really help you improve your keywords rank in popular search engine such as Google, Yahoo, MSN and more.