Recently I got caught up in a thread on a forum about if outgoing links reduce the amount of Page Rank on your site. The discussion went on for ages going around in circles mainly because chrishirst was wrong and refused to be beaten by a newbi, upstart like myself. He was resovled that:
At the end of the day PR as shown on the toolbar is of NO use for gaining useful convertable rankings.
You can read the thread here, you can see why I didn’t want to quit. The conversation is bizarre, even though I had back up every point with evidence he still refused to admit that he may be wrong.
The debate was completely ground to a halt because; He could not get his head around how if the calculation was based only on incoming links how could outgoing links reduce the amount og Page Rank.
We repeated the same points for ages, I tried to explain that the formula was done from scratch so all that it needed was for the calculated value to be less than it was before to have effectively been ‘drained’ but to no avail.
NO I understand that you need to agree on these points on how the Page Rank calculation works:
- The calculation is done for each individual page not site.
- The green bar shown on the toolbar is just a label given to a page depending on the group that the actual page rank falls into.
- The equation is repeated multiple times.
- Each time the calculation is done it is done from scratch; no prior Page rank is worked in the equation.
This is how I like to think of the calulation. Bear in mind this is highly simplified (also if you look at the actual equation the specifics are wrong, it designed to make it easier to understand like went you find out that everythign you learnt in GCSE physic was all a lie when you do A Level Physic).
At the begining of the equation each index page is given a value of 1; part of this value is given as a vote which is divided between all of the pages that it links to. So a new value is calulated. This bit everyone agrees on, Pagerank is calulated from incoming links.
This is where it gets slighty more complicated, the calculation is then repeated starting with the new values, so the pervious pagerank that has been gain on pervious calulation can be passed on. The equation is done over and over again. So because your vote is devided between the pages that you have links to, if you link to pages that are voting for you then in the next calculation (vote) you are going to end up with more page rank than if you would have linked to a lot of pages that do not link back to you.
So that is the main point if you link out of your own website, to a site that does not link back. The pagerank is not coming back to your site so you are going to drain/leak/lose pagerank.
What effect page rank has on how well your site is ranked? That is the million dollar question.
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