adInstanceId= parameter in the script src)amzn_assoc_linkid in your ad unit code (not the same as your Associates tag)Toggle each placement on or off and choose which network fills it. Changes take effect after saving.
Leaderboard banner (728×90) displayed between the featured product and the product grid on the home page.
Rectangle (300×250) or in-content ad between the all-products grid and customer reviews section.
Leaderboard banner at the top of the products listing page.
Banner below the product grid before the footer on the products page.
Ad unit below the cart total, before the checkout button.
Sticky or static leaderboard banner appearing in the footer across all public pages.