SEO - noindex, nofollow and canonical tag -

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I need some explanation about your question.

An example already added to my header

Should I add an ethnic tag to my header again? 

  & lt; Link rel = "canonical" href = "http: //www.example .com / product.php? Item = big-fish" />

let me know :)

Update

We can learn that authentic Tag is currently also supported by Google, Yahoo and Live Search, How about No Indics and Nofollow? Are Yahoo and Live (Bing) also supported?

, and support noindex and nofollow

No indax > Nofollow tells them that you do not want to follow any links on the page.

Adding canonical tags on the same page will not hurt, but the effects are unknown unless you talk to a search engineer.


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