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In my case, its not multiple pages of the same content, but numerous pages of different content with almost-the-same titles and meta desc tags, along with a few nav links and misc content repeated on every page.
I am cleaning up these issues, but confused about the best way to finish the process. Should I remove those urls marked supplemental (G removal tool + NOINDEX meta) and get back to a *cleaner* indexing of my site, hopefully with penalties removed? OR should I keep the offending urls, now in their cleaned-up state, for an eventual deep crawl and reindexing of the corrected site? It seems like the second choice might take quite awhile.
I am guessing that if I remove the supplemental urls for now, I can gradually bring them back (albeit in their corrected form) via my site maps over several months. Does that make sense?
Normally "duplicate" urls only causes one of them to be filtered out of search results -- this is not, strictly speaking, a penalty.
Guess I got it wrong. I'll go back to those threads you recommended.
Thank you again.
Now we are going back and getting the content "right". A lot of work but has to be done. Titles, h tags, descriptions, text, etc. It is taking us about a half hour per page. Only 1000 pages to go. :)
We have also recovered "supplemental pages" by improving the content.
Huh? You originally interpreted it right. This happens all the time.
I don't know what you are thinking now, but cleaning up those near duplicates is a task you should get right on. They will kill your rankings. You are stuck with the supplementals poisoning your rankings indefinitely but you can just do what you can do to fix things. Eventually the pages will be reindexed without the near-dupe content and the supplementals will disappear, but that will probably be awhile.
I was thinking of relacing them with "new" pages that would contain the same conrent, but without the problem titles and metas. The replacement pages would have an entirely different url.
My understanding, from you and others, is to just do the clean up and not make new pages. G will eventually crawl and reindex everything.
Thank you very much for your help.