Canonical URL (Google, Yahoo, MSN,…)
Canonical urls are a way of specifying a clean url for a given page. A single page can have several urls directing to that single page.
For example
http://www.yoursite.com
http://yoursite.com
http://www.yoursite.com/
http://www.yoursite.com/index.html
All of these examples will direct a viewer to your homepage. Canonical urls are a way of finding the best url for a page and ignoring the many variations. The beautiful thing about this new technique, is that you can specify what your single url should be.
Example code on your html page:
<link rel=”canonical” src=”http://www.example.org/your/permalink/page/” />
If you want to read more information on this technique, you can visit the official google blog.





