Noticed a lot of duplicate content errors...

[slapshotstudio]

how do I fix duplicate content errors on categories and tags?  I am trying to get rid of all the duplicate content and I'm really not sure how to.  Any suggestions, advice and/or help on this would be greatly appreciated.  I did add the canonical url through the SEO Yoast plugin, but I am still seeing errors.  I did this on over 200 pages.

Thanks for any assistance in advance.

Jaime

[FedeEinhorn]

For the tags, easy: noindex them, those pages don't offer any value to search engines.

For the categories you could perhaps go the same way, or use another approach and only use 1 category per post.

[William.Lau]

Here are some general things you can do to get rid of duplicate content. Albeit it is slightly more complicated in implementation and when to use them.

rel=canonicals - similar content pages
rel=prev, rel=next - pagination
noindex - pages that are irrelevant or useless. empty pages that are very similar could be a time to use this. or pages that you do not want or believe can be an asset from a user. like shopping cart.
301 redirect - to pages that are pretty much the same

There are many ways to approach duplicate content and depending on your site it will vary. Whether it is a straight forward issue like tags and categories, or if its slightly more complicated in unique parameters that filters a category in a faceted concept.

From your post it seems you have an issue with tags and normally I'd say to noindex tags or canonical them to the proper category. From what I remember /tags/ being indexed is not a good practice.

[slapshotstudio]

Thank you Federico and William.  Really appreciate that.  Yes, I have started "no-indexing" the tags and am working my way through the list.  I will start only using one category per post from here on out.  Thanks again and I really do appreciate your feedback... It helped me immensely!

[slapshotstudio]

One follow up... once I update all the duplicate content related issues, approximately how long will it take to see the revisions take place?

[William.Lau]

Should be immediate on your site.

Moz crawler would take a few crawls probably. Googlebot you can fetch as Google from Webmaster Tools to make sure they crawl it right away.

If you just make the changes and nothing else, you will just be waiting on Google to update it. I'd suggest fetching as Google via WMT and submited all URLs(theres an option there) when fetching.

[slapshotstudio]

Awesome!  Thanks so much!  I will start fetching!  Appreciate that!