Google's founders, in their original paper,[18] reported that the PageRank algorithm for a network consisting of 322 million links (in-edges and out-edges) converges to within a tolerable limit in 52 iterations. The convergence in a network of half the above size took approximately 45 iterations. Through this data, they concluded the algorithm can be scaled very well and that the scaling factor for extremely large networks would be roughly linear in {\displaystyle \log n} , where n is the size of the network.
I have not at all seen the results I would expect in terms of page rank throughout my site. I have almost everything pointing at my home page, with a variety of anchor text, but my rank is 1. There is a page on my site with 3, though, and a couple with 2, so it certainly is not all about links; I do try to have somewhat unique and interesting content, but some of my strong pages are default page content. I will explore the help forum. (I guess these comments are nofollow :P) I would not mind a piece of this page rank …
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.
Assume a small universe of four web pages: A, B, C and D. Links from a page to itself are ignored. Multiple outbound links from one page to another page are treated as a single link. PageRank is initialized to the same value for all pages. In the original form of PageRank, the sum of PageRank over all pages was the total number of pages on the web at that time, so each page in this example would have an initial value of 1. However, later versions of PageRank, and the remainder of this section, assume a probability distribution between 0 and 1. Hence the initial value for each page in this example is 0.25.
Backlinks are important for a number of reasons. The quality and quantity of pages backlinking to your website are some of the criteria used by search engines like Google to determine your ranking on their search engine results pages (SERP). The higher you rank on a SERP, the better for your business as people tend to click on the first few search results Google, Bing or other search engines return for them.

While there are several platforms for doing this, clearly YouTube is the most popular for doing this. However, video marketing is also a great form of both content marketing and SEO on its own. It can help to provide visibility for several different ventures, and if the video is valuable enough in its message and content, it will be shared and liked by droves, pushing up the authority of that video through the roof.
As for the use of nofollow as a way to keep pages that shouldn’t be indexed out of Google (as with your feed example) is terrible advice. Your use of it on your feed link does nothing. If anyone links to your feed without nofollow, then it’s going to get indexed. Things that shouldn’t be indexed need to use either robots.txt or meta robots blocking. Nofollow on links to those items isn’t a solution.
Black hat SEO attempts to improve rankings in ways that are disapproved of by the search engines, or involve deception. One black hat technique uses text that is hidden, either as text colored similar to the background, in an invisible div, or positioned off screen. Another method gives a different page depending on whether the page is being requested by a human visitor or a search engine, a technique known as cloaking. Another category sometimes used is grey hat SEO. This is in between black hat and white hat approaches, where the methods employed avoid the site being penalized, but do not act in producing the best content for users. Grey hat SEO is entirely focused on improving search engine rankings.

Ok, everyone been infering from Matt’s comments that all of these nofollow comments would kill the page rank of this post. Which means this page should have shown up on page 1 for the phrase I searched which was “does google follow nofollow”. In spite of all these nofollow comment links it still was presented as the most relevant page, which it probably is.

Our agency can provide both offensive and defensive ORM strategies as well as preventive ORM that includes developing new pages and social media profiles combined with consulting on continued content development. Our ORM team consists of experts from our SEO, Social Media, Content Marketing, and PR teams. At the end of the day, ORM is about getting involved in the online “conversations” and proactively addressing any potentially damaging content.
You can confer some of your site's reputation to another site when your site links to it. Sometimes users can take advantage of this by adding links to their own site in your comment sections or message boards. Or sometimes you might mention a site in a negative way and don't want to confer any of your reputation upon it. For example, imagine that you're writing a blog post on the topic of comment spamming and you want to call out a site that recently comment spammed your blog. You want to warn others of the site, so you include the link to it in your content; however, you certainly don't want to give the site some of your reputation from your link. This would be a good time to use nofollow.
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. 

But how do you get quoted in news articles? Websites such as HARO and ProfNet can help you to connect with journalists who have specific needs, and there are other tools that allow you to send interesting pitches to writers. Even monitoring Twitter for relevant conversations between journalists can yield opportunities to connect with writers working on pieces involving your industry.
But I also don’t wanna lose PageRank on every comment with a link… If I can give PageRank and lose none, I wanna let the comment there, even without nofollow. But if I lose PageRank on every link, even inside original post, EVEN MORE if nofollow also takes PageRank out of me, I may just start using JavaScript or simple text without anchor for links… I definetely don’t like this idea, but I dislike even more losing PageRank on each outlink on my site. I’d just link top quality sites that I actively wanna vote for Search Engines.
Some backlinks are inherently more valuable than others. Followed backlinks from trustworthy, popular, high-authority sites are considered the most desirable backlinks to earn, while backlinks from low-authority, potentially spammy sites are typically at the other end of the spectrum. Whether or not a link is followed (i.e. whether a site owner specifically instructs search engines to pass, or not pass, link equity) is certainly relevant, but don't entirely discount the value of nofollow links. Even just being mentioned on high-quality websites can give your brand a boost.
There are plenty of guides to marketing. From textbooks to online video tutorials, you can really take your pick. But, we felt that there was something missing — a guide that really starts at the beginning to equip already-intelligent professionals with a healthy balance of strategic and tactical advice. The Beginner’s Guide to Online Marketing closes that gap.
So, now we're getting to backlinks that have relatively little, or even negative value. The value of web directories has diminished dramatically in recent years. This shouldn't come as a surprise. After all, when was the last time that you used a web directory to find anything, rather than just doing a Google search? Google recognizes that directories don't have any real world worth, and so they don't accord much value to backlinks on them. But there is an exception to this rule. Submitting your website to local, industry-specific and niche directories can net you worthwhile backlinks. But if you can't imagine a circumstance where someone would use a certain directory, then it's probably not worth your time.
Wow Brian…I’ve been making and promoting websites full-time since 2006 and just when I thought I’ve seen it all, here you are introducing me to all these innovative ways of getting backlinks that I wasn’t aware of before. I never subscribe to newsletters, but yours is just too good to say no to! Thanks very much for this information. Off to read your other posts now…

If you're serious about finding your voice and discovering the secrets to success in business, one of the best people to follow is Gary Vanyerchuck, CEO of Vayner Media, and early-stage invest in Twitter, Uber and Facebook, has arbitraged his way into the most popular social media platforms and built up massive followings and often spills out the secrets to success in a highly motivating and inspiring way.
Numerous academic papers concerning PageRank have been published since Page and Brin's original paper.[5] In practice, the PageRank concept may be vulnerable to manipulation. Research has been conducted into identifying falsely influenced PageRank rankings. The goal is to find an effective means of ignoring links from documents with falsely influenced PageRank.[6]
Matt Cutts, it’s Shawn Hill from Longview, Texas and I’ve got to say, “you’re a semseo guru”. That’s obviously why Google retained you as they did. Very informative post! As head of Google’s Webspam team how to you intend to combat Social Networking Spam (SNS)? It’s becoming an increasingly obvious problem in SERPs. I’m thinking Blogspam should be the least of Google’s worries. What’s your take?