Yesterday Google had another external toolbar Page Rank update. Not that external Page Rank updates are all that important, but a recently PR sure does make it easier to gauge potential link partners.
Since I’m on the topic of Page Rank, allow me to explain a little bit about what Page Rank is, how it works and what the difference is between internal page rank and external page rank.
Overview:
Page Rank is one of the over 200 signals Google looks at when it determines a web sites ranking for a given search phrase. It’s purpose is to indicate how popular a web site by analyzing the linking relationships between sites.
Background:
Several years ago, Google became the first search engine to factor inbound, outbound and internal linking relationships between sites into their search algorithm. After analyzing these relationships, Google assigns a score to the page called Page Rank. Years ago, when Page Rank was in it’s infancy, it was one of only a few models (combination of related signals) that Google used in it’s algorithm. Once it became known that Page Rank was a primary influence factor, web masters began gaming the system to artificially inflate their Page Rank score resulting in a lower quality search index. To combat this, Google began devaluing paid links, reciprocal links and site-wide links, and created the “no follow” tag.
Today:
Today, new models such as personalization, time, geo-location, site metrics, etc. have begun to influence rankings so that Page Rank has become just one of many models taken into account. While links are still the primary driver of rankings, what most people think of as “Page Rank” is not the end all - be all of ranking.
Internal Page Rank vs. External Page Rank
Most web masters consider Page Rank to be the 1-10 green bar ranking in Google’s Toolbar. In actuality, this is 10,000 foot view of what’s really going on behind the scenes. It’s like looking at earth from space and saying, “Earth consists of water, clouds and land”. Yes, earth does consist of those things, but there’s a lot more to earth than just that.
For clairfication purposes, we’ll call the 1-10 toolbar score, “External Page Rank” and we’ll refer to the behind-the-scenes score that Google uses in it’s algorithm the “Internal Page Rank”.
So here is the main break-down…
- External Page Rank is for consumers and does not affect rankings.
- External Page Rank is on a scale of 1-10. (Example: PR 5)
- External Page Rank gets updated every few months.
- Internal Page Rank is for Google and is factored into rankings.
- Internal Page Rank has a much detailed range. (Example: PR 5.38409)
- Internal Page Rank is constantly updated.
Is external Page Rank still useful?
External Page Rank is useful for a quickly determining the quantity and quality of incoming links to a page. It can also give you a rough indicator of a pages internal Page Rank for a particular snapshot of time, however even a recently updated External Page rank may actually reflect an Internal Page Rank a month or two old.