seo - Google webmaster tools and duplicated links -


i have problems , im confusing google webmaster tools

i have example:

http://site.com/link/text.html

and im using customvar on google analytics track clicks external site example

http://site.com/link/text.html?promoid=123

now in webmaster tools have toons of duplicated links

in robots.txt im add

disallow: *?promoid

but im not sure if idea...

what should now, still use robots file , disallow promoid or maybe use rel="canonical" ?

edit: links ?promoid=123 posted on external site not on my...

this canonical urls for. tell google http://site.com/link/text.html main url use page , other page using canonical url minor variation of page.


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