Selected answers from the Dumb SEO Questions Facebook & G+ community.
Seolution: Do you noindex tag pages in wordpress?
Ryan Cramer: Personally, I haven't set the noindex on my tag pages because I figure there may be some value in having the list of relative posts, pretty much helping the bots along with letting Google know what your intended topics are. ;However, I'd like to see what other people think... good question
Edwin Jonk: From the expert panel in this weeks SEO Questions hangout on air on 00:27:34 into the YouTube video: https://dumbseoquestions.com/q/do_you_noindex_tag_pages_in_wordpress +Seolution
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Amit Jain: Yes I Noindex tag, category as well as date archive pages, because these cause duplicate content problem.
Ryan Cramer: I guess if you aren't doing good canonical on the pagination and including unique content on the tags, just simply listing related articles then a nofollow would be recommended.