If you want that all of your traffic moves to non-www version of your website then you will need to insert a piece of code into your htaccess file in public_html folder. Choosing one from www or non-www version of your website is good for SEO.
Redirct WWW to Non-WWW with .htaccess
1. Login to cPanel and go to File Manager.
2. Go to Public_html folder > edit .htaccess file and insert this piece of code into it:
RewriteEngine On RewriteCond %{HTTP_HOST} ^www.example.com [NC] RewriteRule ^(.*)$ http://example.com/$1 [L,R=301]
3. Change example.com to your own domain name and save the file.
That’s it, now all of your visitors will be seeing non-www version of your website no matter if they type www.example.com or just example.com.