The paper’s authors noted that AltaVista (on the right) returned a rather random assortment of search results–rather obscure optical physics department of the University of Oregon, the campus networking group at Carnegie Mellon, Wesleyan’s computer science group, and then a page for one of the campuses of a Japanese university. Interestingly, none of the first six results return the homepage of a website
PageRank is only a score that represents the importance of a page, as Google estimates it (By the way, that estimate of importance is considered to be Google’s opinion and protected in the US by the First Amendment. When Google was once sued over altering PageRank scores for some sites, a US court ruled: “PageRanks are opinions — opinions of the significance of particular Web sites as they correspond to a search query….the court concludes Google’s PageRanks are entitled to full constitutional protection.)
This is the argument that quickly emerged about blog comments recently. Say I have an article on a blog with 5 links in the editorial copy — some of those links leading back to other content within the blog that I hope to do well. Then I get 35 comments on the article, with each comment having a link back to the commenters’ sites. That’s 40 links in all. Let’s say this particular page has $20 in PageRank to spend. Each link gets 50 cents.
I did this post because I wanted people to understand more about PageRank, how it works, and to clarify my answers at SMX Advanced. Yes, I would agree that Google itself solely decides how much PageRank will flow to each and every link on a particular page. But that’s no reason to make PageRank a complete black box; if I can help provide people with a more accurate mental model, overall I think that’s a good thing. For example, from your proposed paragraph I would strike the “The number of links doesn’t matter” sentence because most of the time the number of links do matter, and I’d prefer that people know that. I would agree with the rest of your paragraph explanation–which is why in my mind PageRank and our search result rankings qualifies as an opinion and not simply some rote computation. But just throwing out your single paragraph, while accurate (and a whole lot faster to write!), would have been deeply unsatisfying for a number of people who want to know more.
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.