够趣堂

前些天突然间收到一封关于Google  PageRank（简称为PR）的邮件，发自Daniel Scocco。本来想将其翻译成中文与大家分享，不过几经努力都得不到自己的满意，毕竟自己的水平非常常常……的有限。再者，网上关于PR的介绍和相关文章多不胜数。因此，在这里就只有拿其原文与大家分享。fworld对PR的了解是非常的有限，但是我知道一个网站的PR非常重要，至少它能够很直观地说明一个网站的受欢迎程度和重要性，当然这个除了某些PR莫名奇高的网站。事不宜迟，请看原文：

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Hi fworld,

Daniel Scocco here, and this is the Daily Blog Tips newsletter.

Today I want to talk to you about Google PageRank, and about how
you can actually create PageRank within your websites!

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First things first: What is Google PageRank? It is an algorithm
created by the founders of Google to estimate the importance of web
pages. The basic idea behind the PageRank algorithm is the fact that
a link (also called hyperlink or backlink) from page A to page B can
be seen as a vote of trust from page A to page B. The higher the
number of links pointing to a page, the higher its PageRank, and the
higher its rankings inside Google’s search results.

One detail that you need to keep in mind is that each link has a
specific value, which is determined by the PageRank of the page
where the link is located divided by the total number of outgoing
links on that page. For instance, if a page has a PageRank value of
8 and 4 outgoing links, each of those links will pass 2 points of
“link juice” (the calculations on the algorithm are more complex, but
this is the basic idea).

Most people focus on getting external links to increase their
PageRank, but they forget that internal links also pass link juice,
and this is how you can create PageRank within your websites.

Now let me use a simple example to illustrate the concept.

Suppose that you just created a website with one page only, the
homepage. At this point your website has a PageRank of 0, because it
is not even indexed by Google.

You then convince a friend to link to your website. The page where
the link is placed has a PageRank of 10 and 2 outgoing links, so
your website is receiving 5 points of link juice from that link.

The actual PageRank of your website will be 4.25, or 5 x 0.85. This
happens because Google applies a damping factor of 0.85 when it makes
PageRank calculations (this is necessary else the PageRank of two
pages linking to each other would grow to infinite).

If you then proceed to create a second page on your website, linking
to it from the homepage, that second page will have a PageRank of
3.61 (4.25 from the link it got from your homepage, multiplied by
0.85).

And there you go. By adding a second page to your site your managed
to actually create PageRank. The cool thing is that when you link
that second page to the homepage, they will be sending link juice
to each other, back and forth, until the damping factor kills
the effect.

Now don’t worry if you haven’t followed the maths. The takeaway
message is: every time Google indexes a new page from your
website, the total PageRank within your website will also increase.

Getting external links is obviously essential to having a high
PageRank, but increasing the number of pages that Google indexes
from your site can also help, and most people neglect this.

Finally, if you want to monitor how many pages Google is indexing
from your website, simply search for “site:yourdomain.com” on Google.

Talk to you soon,
Daniel Scocco

Rua Samba, 4, Salto, 27 13320000, BRAZIL

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