AdSense with WordPress - monetization

Tutorial article on how to place Google AdSense adverts on a WordPress site.

Step-by-step, "idiot friendly" - just how I need and like tutorials to be, for when I forget it in a few years time and need to configure it again.

My setup doesn't use any plugins - which I think is best. Just a little custom code in a child theme.

With a general article on website monetization models I've tried.