#### Also, by means of the iterative calculation, the sum of all pages' PageRanks still converges to the total number of web pages. So the average PageRank of a web page is 1. The minimum PageRank of a page is given by (1-d). Therefore, there is a maximum PageRank for a page which is given by dN+(1-d), where N is total number of web pages. This maximum can theoretically occur, if all web pages solely link to one page, and this page also solely links to itself.

PageRank is a link analysis algorithm and it assigns a numerical weighting to each element of a hyperlinked set of documents, such as the World Wide Web, with the purpose of "measuring" its relative importance within the set. The algorithm may be applied to any collection of entities with reciprocal quotations and references. The numerical weight that it assigns to any given element E is referred to as the PageRank of E and denoted by {\displaystyle PR(E).} Other factors like Author Rank can contribute to the importance of an entity.
Something a lot of people seem to have overlooked was hinted at in Greg Boser’s comment above. Greg identified that there is a major (and unfair) disparity with how authority sites such as Wikipedia disrupt the linkscape by run-of-site nofollows. Once Wikipedia implemented the no-follows, previously high-value links from Wikipedia were rendered worthless making the site less of a target for spammers. Increasingly large sites are following suit in order to cleanse their own pages of spam.
Danny, I was on the panel where Matt suggested that and I point blank asked on stage what happened when folks starting abusing the tactic and Google changed their mind if you recall (at the time, I’d seen some of the things being done I knew Google would clarify as abuse and was still a nofollow unenthusiast s a result at that time). And Matt dismissed it. So, I think you can take home two important things from that – 1. SEO tactics can always change regardless of who first endorses them and 2. Not everything Matt says is etched in stone. <3 ya Matt.
```After your site has been built out, creating a social media presence is the best second step for most businesses. All businesses should have a Facebook Page that’s fully fleshed out with plenty of information about your business. Depending on your audience, you can also start a Twitter, Instagram, and/or Pinterest account. Social media is a long-term commitment that requires frequently updating and monitoring, but it’s one of the best ways to build an online community around your business.
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NOTE: You may be curious what your site’s or your competitor’s PR score is. But Google no longer reveals the PageRank score for websites. It used to display at the top of web browsers right in the Google Toolbar, but no more. And PR data is no longer available to developers through APIs, either. Even though it’s now hidden from public view, however, PageRank remains an important ingredient in Google’s secret ranking algorithms.
According to Statistica, 76% of the U.S. population has at least one social networking profile and by 2020 the number of worldwide users of social media is expected to reach 2.95 billion (650 million of these from China alone). Of the social media platforms, Facebook is by far the most dominant - as of the end of the second quarter of 2018 Facebook had approximately 2.23 billion active users worldwide (Statistica). Mobile devices have become the dominant platform for Facebook usage - 68% of time spent on Facebook originates from mobile devices.
I won’t blame MC. Google, knows what they does. These are things that webmasters need not worry about. Well, it won’t make much difference as far as I think. I don’t use no follow tags specifically – I use WP for blogging purposes and it does rest of the things for me other than writing content which I do. I think it is the content and the external links that sites point to – which should be considered. I mean, if a computer blog owner posts a really fantastic computer article about something related to computer, and also puts some links to external pages (which are really useful for the readers), then that post, should be ranked high in gooogle – And I think google does this well – So, webmasters, just concentrate on yur website/blogs etc and leave rest of the things to Big G.
##### PageRank always was and remains only one part of the Google search algorithm, the system that determines how to rank pages. There are many other ranking factors that are also considered. A high PageRank score did NOT mean that a page would rank well for any topic. Pages with lower scores could beat pages with higher scores if they had other factors in their favor.

The mathematics of PageRank are entirely general and apply to any graph or network in any domain. Thus, PageRank is now regularly used in bibliometrics, social and information network analysis, and for link prediction and recommendation. It's even used for systems analysis of road networks, as well as biology, chemistry, neuroscience, and physics.[45]