Mobile Websites vs Responsive
https://webtegrity.wpengine.com/blog/web-design-tips/mobile-websites-vs-responsive-websites/
Video to explain Responsive Design
https://webtegrity.wpengine.com/web-design-company-in-san-antonio/mobile-friendly-websites/
Plugins to help you make your website mobile-friendly
https://www.wpuniversity.com/blog/quickly-and-easily-make-your-wordpress-site-mobile-friendly
