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Doing the Google command site:mywebsite.com/my-question-post-url I can find multiple pages indexed with ?show parameter.

For example:

How can I noindex all those duplicate results?

1 Answer

+2 votes
You don't need to 'noindex' them. Q2A adds the 'canonical' meta tag to tell search engines the correct URL of the page (the one without the 'show' parameter). I checked and your site has the correct tag showing.
Thank you, I don't understand why Google is indexing anyway. But okey, I will wait until the next crawl from Google bot and I will check again.