Techniques for Preventing Duplicate URLs in Your Website

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Chances are, there are several different URLs that point to the same content on your website. For example, the URLs
Code:
http://<i>yoursite</i>.com
,
Code:
http://<i>yoursite</i>.com/default.aspx
,
Code:
http://www.<i>yoursite</i>.com
, or
Code:
http://www.<i>yoursite</i>.com/default.aspx
are all
likely valid URLs that results in the same content, namely the homepage for
Code:
<i>yoursite</i>.com
. While having four different URLs reference the same content
may not seem like a big deal, it can directly impact your websites search engine placement and, consequently, its traffic. To a search engine, those four different
URLs represent four different pages, even though the all produce the same content.

To understand how allowing duplicate URLs in your website can affect your search engine placement, first understand that search engines base a pages placement in the
search results based, in part, on how many other websites link to the page. Now, imagine that there are 1,000 web pages from other websites that link
to your homepage. You might conclude, then, that a search engine would rank the importance of your homepage based on those 1,000 links. But consider what would happen
if 25% of those links linked to
Code:
http://<i>yoursite</i>.com
, 25% to
Code:
http://<i>yoursite</i>.com/default.aspx
, and so on. Rather than your homepage
reflecting 1,000 inbound links, instead the search engine assumes there are only 250 links to
Code:
http://<i>yoursite</i>.com
, only 250 links to
Code:
http://<i>yoursite</i>.com/default.aspx
, and so on. In effect, redundant URLs can dilute your search engine ranking.

A key tenet of http://webopedia.com/TERM/S/SEO.html search engine optimization is http://en.wikipedia.org/wiki/URL_normalization <i>URL normalization</i> ,
or <i>URL canonicalization</i>. URL normalization is the process of eliminating duplicate URLs in your website. This article explores four different ways to implement
URL normalization in your ASP.NET website. Read on to learn more!

http://www.4guysfromrolla.com/articles/072810-1.aspx" class="readmore Read More >

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