Hello,

You can show your ad in the pre-footer, you can find this area in the Theme Settings > Footer. It will be shown on all the products/products categories. You can disable the pre-footer in the pages you do not want to show the ad, there is the option in the page options: https://xtemos.com/docs/woodmart/options-for-pages/

One more option to show the ad throughout the site is the Header banner. You can find this option in the Theme Settings > General.

Best Regards