Canonical Urls

Canonical URL

Canonical url is search engine friendly URL that you want the search engines to treat as authoritative. In other words, a canonical URL is the URL that you want visitors to see or Canonicalization is the process of picking the best url by search engine when there are several choices, and it usually refers to home pages.

Some CMS configured similar content to multiple urls by some errors and some people also used index.html or default.html insted / or full domain name. The canonical version of any URL is the single most authoritative version indexed by major search engines.Search engines typically use PageRank or a similar measure to determine which version of a URL is the canonical URL.

Examples of URLs which may contain the same information in spite of being at different web addresses:

1-http://www.yourdomain.com/
2-http://www.yourdomain.com/index.html
3-http://yourdomain.com
4-http://yourdomain.com/index.html