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https://www.webmasterworld.com/google/4842918.htm [webmasterworld.com] by engine - 4:43 pm on Apr 21, 2017
(utc +1)
We got hit very hard by Fred and seemingly are getting hurt by some of the more recent updates. We've fixed a ton of on-site issues, and I suspect a technical mistake we made with URL parameters might have gotten us hit with a cloaking penalty.
Now that everything is cleaned up, I am hoping to see a recovery. The biggest issue that still shows in Search Console is that there are tens of thousands of pages in the index that probably shouldn't be there (they're basically slight variations based on a parameter). We also had a mistake in how MVC changed URLs without updating the canonicals, so Google inaccurately thinks lots of pages are canonical to lots of other pages. Obviously this could be seen by Google as lots of duplicate content and a terrible ratio of low quality pages to high quality pages. I think the only reason we still rank on page 1 for lots of searches (though lower on the page) is that user experience is good - decent dwell time, bounce rate, time on site, pages per visit, fast loading, etc.
Traffic from search is down 85% or so. Is there any way to get Google to reprocess the site faster, update the canonicals, and clean the index? I know we could potentially do URL removal, but we're talking about tens of thousands of pages, and don't actually know specifically which are in the index (so we could have to submit hundreds of thousands to make sure we got most of those).