Questions
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Does adding a noindex tag reduce duplicate content?
Although adding a no-index will no doubt remove the page from the index, my suggestion would be to implement a canonical tag which you can use to point to the original/best source page. This way any links from the page will still be used for internal site crawling etc. This way you are actually telling google that you have similar pages but one is the best that you want for indexation purposes. rel="canonical" href="/original-or-page-you-want-to-rank-and-be-the-source.html" />
Technical SEO Issues | | TimHolmes0