"naked domain"
http://www.wpbeginner.com/beginners-guide/www-vs-non-www-which-is-better-for-wordpress-seo/
https://support.google.com/webmasters/answer/44231?hl=en
Regardless of which you pick, it should work either way. Meaning if people type www but you've picked no-www, it should redirect. Not render at either URL.