In episode 238 of Semantic Mastery's weekly Hump Day Hangouts, one participant asked if one should 301 redirect multiple tag pages that cause duplicate content.
The exact question was:
I'm doing an website analysis for a client (Yes! They are paying me for this service!). The website has a large number of Tag pages that are indexed, but also contain a high percentage of duplicate content. Should these tag pages be 301 redirected to relevant pages, left alone, or do something else? Thanks, Scott