Ease of Use
WordPress is very easy to use with its interface for Professional or beginners.
Security
By using Cloudflare and an SSL certificate it is harder for hackers to take control of your website. You’re also able to download security plugins that go a step further with security by limiting login attempts and entering broken pages.
Themes
Make your site different from everyone else’s by using free or paid WordPress themes that are fully customisable.
Plugins
If you’re looking for your site to do something different for example having a live chat or popup window WordPress will probably have a plugin for it which takes it one step further customising your website.