Hi. Depending on your website setup, a Content Management System like Wordpress of Joomla have many available plugins to help manage it from the Dashboard/Administrator area.
Otherwise it can be hard wired into static pages or the theme template files with code provided by the code generator from google.
I will need access to your google/gmail account to bind the website to your Adsense service. It is possible to customize the Adsense based on query parameters, or keywords the visitor used to find your site on google.
Since I am new here, I value feedback from completed projects over financial reward so an inexpensive solution is possible with me.
Regards,
Rauli Kumpulainen