Is there a way to use a canonical tag to mitigate duplicate content?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  Mickey Wesler: On a large site I am working on for SEO and am wondering on dyamic pages such as results pages we are getting duplicate title and description tags according to webmaster tools. ; Is there a way to use a canonical tag to mitigate the duplicate tags or any other advice?
  Thank you?
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  Andrea Pernici: If for Results pages you intend internal search result page those should be noindexed or blocked by robots.txt according to Google guidelines.
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  sathya shankara: Apply a condition in robots.txt file so that internal search result pages should not get indexed. Let me know if you have any doubt.
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  Mickey Wesler: Thank you so much for the great responses much appreciated!!
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  Neeraj Kumar: Yes +Mickey Wesler internal search result and archives pages too get indexed as duplicate pages or duplicate content pages... have to nonindex them as rightly said by +Andrea Pernici and +sathya shankara
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  Edwin Jonk: From the expert panel in this weeks SEO Questions hangout on air on 00:45:01 into the YouTube video: https://dumbseoquestions.com/q/is_there_a_way_to_use_a_canonical_tag_to_mitigate_duplicate_content +Mickey Wesler
  
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