Canonical link element

[kasnake]

I understand that canonical link element (aka rel=canonical) need be there on the page of a site. But if per chance of pages having URLs that get appended one way or another with stuff that doesn't change the content how will it affect my ranking?

 

[words2riches]

A canonical link element is an HTML element that helps webmasters prevent DUPLICATE content issues by specifying the proffered version of a web page.

 

[harreymartin]

Canonical tag use for search engine crawler that define, this content maybe published on another page of my website. Then search engine couldn't consider that as duplicate content.

 

[sam051]

Canonical issue is those issues when your one website URL look many times after one searches.