www or non-www for your website?
www version is better if you are planning more subdomains or if your website gets more traffic. technically www version has some advantages.
non-www version is better for small websites, with low traffic. Small scale business websites can use a non-www version even though both versions work similarly.
In terms of SEO, a non-www domain offers you 4 extra character options that you can use for adding your keyword in URL.
search engines always love shorter URLs, so you can use the 4 extra characters for including your keywords.