iwanketch
male - 50 years, Surabaya, Indonesia
Blog 2
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Tips: Domain names and Filenames
To a spider, www.domain.com/ ,domain.com/, www.domain.com/index.html and domain.com/index.html are different urls and, therefore, different pages. Surfers arrive at the site’s home page whichever of the urls are used, but spiders see them as individual urls, and it makes a difference when working out the PageRank. It is better to standardize the url you use for the site’s home page. Otherwise each url can end up with a different PageRank, whereas all of it should have gone to just one url.
If you think about it, how can a spider know the filename of the page that it gets back when requesting www.domain.com/ ? It can’t. The filename could be index.html, index.htm, index.php, default.html, etc. The spider doesn’t know. If you link to index.html within the site, the spider could compare the 2 pages but that seems unlikely. So they are 2 urls and each receives PageRank from inbound links. Standardizing the home page’s url ensures that the Pagerank it is due isn’t shared with ghost urls.
Example: Go to my UK Holidays and UK Holiday Accommodation site - how’s that for a nice piece of link text
. Notice that the url in the browser’s address bar contains “www.”. If you have the Google Toolbar installed, you will see that the page has PR5. Now remove the “www.” part of the url and get the page again. This time it has PR1, and yet they are the same page. Actually, the PageRank is for the unseen frameset page.
When this article was first written, the non-www URL had PR4 due to using different versions of the link URLs within the site. It had the effect of sharing the page’s PageRank between the 2 pages (the 2 versions) and, therefore, between the 2 sites. That’s not the best way to do it. Since then, I’ve tidied up the internal linkages and got the non-www version down to PR1 so that the PageRank within the site mostly stays in the “www.” version, but there must be a site somewhere that links to it without the “www.” that’s causing the PR1.
Imagine the page, www.domain.com/index.html .The index page contains links to several relative urls; e.g. products.html and details.html. The spider sees those urls as www.domain.com/products.html and www.domain.com/details.html .Now let’s add an absolute url for another page, only this time we’ll leave out the “www.” part - domain.com/anotherpage.html. This page links back to the index.html page, so the spider sees the index pages as domain.com/index.html. Although it’s the same index page as the first one, to a spider, it is a different page because it’s on a different domain. Now look what happens. Each of the relative urls on the index page is also different because it belongs to the domain.com/ domain. Consequently, the link stucture is wasting a site’s potential PageRank by spreading it between ghost pages.
Adding new pages
There is a possible negative effect of adding new pages. Take a perfectly normal site. It has some inbound links from other sites and its pages have some PageRank. Then a new page is added to the site and is linked to from one or more of the existing pages. The new page will, of course, aquire PageRank from the site’s existing pages. The effect is that, whilst the total PageRank in the site is increased, one or more of the existing pages will suffer a PageRank loss due to the new page making gains. Up to a point, the more new pages that are added, the greater is the loss to the existing pages. With large sites, this effect is unlikely to be noticed but, with smaller ones, it probably would.
So, although adding new pages does increase the total PageRank within the site, some of the site’s pages will lose PageRank as a result. The answer is to link new pages is such a way within the site that the important pages don’t suffer, or add sufficient new pages to make up for the effect (that can sometimes mean adding a large number of new pages), or better still, get some more inbound links. -
What is PageRank?
PageRank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page. The more votes that are cast for a page, the more important the page must be. Also, the importance of the page that is casting the vote determines how important the vote itself is. Google calculates a page’s importance from the votes cast for it. How important each vote is is taken into account when a page’s PageRank is calculated.
PageRank is Google’s way of deciding a page’s importance. It matters because it is one of the factors that determines a page’s ranking in the search results. It isn’t the only factor that Google uses to rank pages, but it is an important one.
From here on in, we’ll occasionally refer to PageRank as “PR”.
Notes:
Not all links are counted by Google. For instance, they filter out links from known link farms. Some links can cause a site to be penalized by Google. They rightly figure that webmasters cannot control which sites link to their sites, but they can control which sites they link out to. For this reason, links into a site cannot harm the site, but links from a site can be harmful if they link to penalized sites. So be careful which sites you link to. If a site has PR0, it is usually a penalty, and it would be unwise to link to it.
