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Over the years people have come to rely heavily on Google's Page Rank as an indicator for a site's authoritativeness. It's still a very prominent metric but people (esp. SEM Experts) are now beginning to understand that there's a whole lot more to it.

For example a site with low Page Rank can still have thousands of visitors and do well from a search engine perspective.

I think people still like to have that 1, all encompassing value and I am trying to wrap my head around how that number would be determined for Blogs.

BlogInfluence.net uses the formula: [(blog+posts+web links) + (bloglines subs * 2)] * 1+(PageRank/10) (using Yahoo Back Links, Technorati Back Links, Blog Lines Subscribers and Google Page Rank).

I believe there should be a few more metrics added to this formula which would help strengthen its value:

- Yahoo and Google News links (for authority)

- FeedBurner Subscribers (for readership)

- Technorati Rank (for authority)

- Back-links from Major Search Engines with some type of weighting applied (i.e.: Google = 10, Yahoo = 6, MSN = 4)

- Unique Visitors

- Alexa Reach/Rank

- Digg, Delicious Votes

There are probably many more metrics we could add and I would love to hear suggestions from others.

A formula combining all of these metrics would really help measure how well a blog is doing, especially after implmenting a blog promotion strategy.

With the various APIs available to us, I don't see why this measurment couldn't be developed into some type of software tool or webpage.

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Manoj has been working in the search engine marketing industry since 2002. He started out as a software developer but now provides in-depth web site analysis using web analytics.

http://www.enquiro.com
Manoj is also the author of Web Analytics World. Web Analytics is an essential component in developing a successful
online campaign. Help convert visitors into customers by understanding
them.