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Hi, I have my website. I recently indexed my website on google, but the same page is getting indexed in 2 URL's. One with www and other without www. How do I redirect my non-www page to www? please help me. The site is working on next.js platform.

I have got a not-for-profit website that is rather large. Please advise me on how to replace multiple (hundreds or even thousands) of www with a subdomain. handle after moving all the HTML pages from the website's root to a subdomain (as in subdomain.domain.com)? Is there an easy and quick way...