The rel=”canonical” link duplicate content panacea
As many readers probably know, Google and other search engines recently announced support for a rel=”canonical” link attribute value. The new attribute value canonical (not a tag mind you, link is the html tag) can be used by website developers to specify which of essentially similar web pages is the definitive version.
A SEO problem known as duplicate content arises when websites use different URLs, generally through parameters, to provide slightly different versions of a page, such as a printer friendly version, or to support web analytics campaign tracking. In order to give search users unique choices, search engines tend to choose the “best” URL for a page, filtering out similar versions.
