Larry Page and Sergey Brin developed PageRank at Stanford University in 1996 as part of a research project about a new kind of search engine. Sergey Brin had the idea that information on the web could be ordered in a hierarchy by "link popularity": a page ranks higher as there are more links to it. Rajeev Motwani and Terry Winograd co-authored with Page and Brin the first paper about the project, describing PageRank and the initial prototype of the Google search engine, published in 1998: shortly after, Page and Brin founded Google Inc., the company behind the Google search engine. While just one of many factors that determine the ranking of Google search results, PageRank continues to provide the basis for all of Google's web-search tools.
If you are serious about improving web traffic to your website, we recommend you read Google Webmasters and Webmaster Guidelines. These contain the best practices to help Google (and other search engines) find, crawl, and index your website. After you have read them, you MUST try our Search Engine Optimization Tools to help you with Keyword Research, Link Building, Technical Optimization, Usability, Social Media Strategy and more.
So what happens when you have a page with “ten PageRank points” and ten outgoing links, and five of those links are nofollowed? Let’s leave aside the decay factor to focus on the core part of the question. Originally, the five links without nofollow would have flowed two points of PageRank each (in essence, the nofollowed links didn’t count toward the denominator when dividing PageRank by the outdegree of the page). More than a year ago, Google changed how the PageRank flows so that the five links without nofollow would flow one point of PageRank each.
For instance, the Pew Internet & American Life Project has demographic data that suggests individuals between the ages of 18 and 33 are the most likely to use mobile Internet technology like smartphones and tablets, while the “Gen-X” demographic of individuals who are in their 30’s and 40’s are far more likely to seek out information through their laptop and desktop computers.(See also Targeted Marketing)
That type of earth-shattering failure and pain really does a number on a person. Getting clean and overcoming those demons isn't as simple as people make it out to be. You need to have some serious deep-down reasons on why you must succeed at all costs. You have to be able to extricate yourself from the shackles of bad habits that have consumed you during your entire life. And that's precisely what Sharpe did.
@matt: I notice a bit of WordPress-related talk early in the comments (sorry, Dont have time to read all of them right now..), I was wondering if you’d like to comment on Trac ticket(http://core.trac.wordpress.org/ticket/10550) – Related to the use of nofollow on non-js-fallback comment links which WordPress uses – Its linking to the current page with a changed form.. the content and comments should remain the same, just a different form.. I think the original reason nofollow was added there was to prevent search engines thinking the site was advertising multiple pages with the same content..
9. Troubleshooting and adjustment. In your first few years as a search optimizer, you’ll almost certainly run into the same problems and challenges everyone else does; your rankings will plateau, you’ll find duplicate content on your site, and you’ll probably see significant ranking volatility. You’ll need to know how to diagnose and address these problems if you don’t want them to bring down the effectiveness of your campaign.