You have a website say example.com, you want it only to be accessed by www.example.com, instead of both example.com & www.example.com or you may want your domain to be only accessed by example.com instead of both example.com & www.example.com. What is www and why should I redirect to my preferred domain? Well here's the answer: Www is actually a subdomain of your domain. www actually refers to [world wide web] hmm! well than why redirect? The best answer is both the domains might have same content i.e. yourdomain.com and www.yourdomain.com, and its not very good to the search engine bots. What should I choose? www or non-www domain? This is completly depended upon you and the name of your domain. Sometimes domains are quite good without www for example https://letsencrypt.org . The domain with or without www does'nt effects search engine optimization (SEO). 1. Redirect your website from non-www to www i.e. example.com to www.example.com Configure your ngin