How to place Page-level ads on your website and blogs?
Page-level ads are a family of ad formats that offer a new and
innovative way for you to monetize your content. With Page-level ads,
you place the same piece of ad code once on each page that you want to
show the ads. Once you've added the code, AdSense will automatically
show Page-level ads at optimal times when they’re likely to perform well
for you and provide a good experience for your users.
Place this ad code in the <head> tag (or at the top of the <body>) of the pages where you want to show the ads. It’s the same ad code for every page and site, and you won’t need to change it even if you adjust your Page-level ads settings.
View more information, HERE!