A page will still render if you have multiple things with the same ID, but you'll run into troubles if/if you attempt to dynamically update stated aspects by contacting them with their ID, since they are not exceptional. The general sibling combinator selector is similar to the adjacent sibling combinator https://www.presta-addons-modules.com/en/front-office/prestashop-adsense-on-home-page-selected-left-right-column.html