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Google Pagerank is based on the authoritative value of the pages (not websites) that link to a page (not a website). The more incoming links or "backlinks" a page has the higher its authoritative value becomes, raising its page rank. A misconception is that the main landing page of a website is always the highest valued page and that page rank is a site wide calculation. This simply isn't the case. So many websites unknowingly point every single text ad, banner, forum post and other backlinks to the main page causing it to hoard page rank. Deep pages can, and in some cases should, have a higher page rank value than the main page. If linking structure has been done correctly then page rank values are shared. A perfect example is http://www.sthomas.net which at the time of this writing is a solid PR3, however take a look at http://www.sthomas.net/roberts-perl-tutorial.htm, this little perl tutorial page is a PR5 and shares its page rank with the main page. So, there ya go... How to calculate pagerank:
Myths about backlinks and pagerank: Myth: The Green Bar shows true pagerank. Truth: The green bar (also called the fools bar) is just a visual representation of possible rank and not the actual pagerank. Googles pagerank technology is complex containing many variables which are only known to the Google brain trust. The green bar is nice but not a truly accurate representaion. Myth: Backlinks should be "relevant" to the theme of your website or they won't count. Truth: It doesn't matter where a backlink comes from. While it is advised to target relational links to your pages the fact is you can get links from anywhere and they'll count. Why do you think link farms and FFA's have done so well? The caviat here is that if you use FFAs or link farms and they get busted they'll pull your rank down with them. You need to choose your backlinks with some discretion and a little common sense. Myth: The higher your page rank the more traffic the site will get Truth: No, there are plenty of high PR pages out there that get very little traffic and even more who have a 0 or 1 page rank and get a load of traffic. Page rank is just a means for Google to estimate authoritative value. A benefit of higher PR is SERPs, however this has much to do with how the backlinks are presented and is beyond the scope of this article. The sites you should try to target in your backlinking efforts; Always link to "like" pages for their relational value as this tends to increase click through rates. Linking to niche pages that are on topic with your pages helps to build authority. If you are just starting out (PR0/PR1) you should try to get as many incoming links as possible, but keep them related whenever possible. Directories, press release and article sites are excluded from relational constraints simply because they are category specific lists. The trick is finding directories that have their sub-categories ranked. Once your rank begins to rise, let's say to a PR2 or PR3, then you'll probably want to be a bit more selective on which sites you'll be trading with. Trading with sites that have a page rank of -1 to above your page rank will help you keep the PR climbing. When you move above a PR4 you should probably stop trading with anything less than a PR4 simply because the numbers are staggering to increase PR on lesser ranked pages. I'm not saying you should throw out those trades, just don't waste time persuing them. You'd need over 500 PR4 backlinks just to bump up to a PR5. Consider factors such as the age of the websites you are trading with. Older websites tend to be stable with steady traffic and page rank. You really have to be careful who you link with especially these days where websites go up and down like pogo sticks. Value of Page Rank: Link values- It's impossible to place an exact value on page rank because there are just too many variables that need to be considered. I've come to my own personal conclusion that each level of page rank is compounded by about 2, in terms of value. With this loose (and I caution, very loose) example, if selling a link on a PR2 can fetch $10 per month then it would jump to $20 per month for a link on a PR3, $40 on a PR4, $80 PR5, $160 PR6, $320 PR7 and so on. Again, I want to make it clear that this is just a generalized estimate for ease of calculating a general value for just the backlink. Traffic and exposure will certainly increase or decrease the value of a any backlink. Website values- Page rank is extremely nice to have even if you don't think it has a legitimate value. Selling a website that enjoys a high page rank is, for all intents and purposes, far easier than one without it. Page rank comes with age, marketing and backlink building and that effort translates into value. A safe value to place on page rank is to use 5X the base value of a PR1 per level up. Of course this doesn't take into account the traffic, domain name value, market conditions or income generated by the website. Note; Google isn't perfect and there are many anomalies that defy logic such as pages that have zero incoming links yet a full green bar. The truth is that nothing is set in stone. Look at what makes other websites successful, replicate and improve it for yourself. |
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