Can I place advertisements on my site using Listable?

Yes! You can add advertisements ads or banners (including Adsense) overall widgetized sections, as listed below:

• Front Page — you can place ads between each horizontal section.
• Listing Page — on the right sidebar area or below the main content.
• Footer Area — favorable for wide banners which will appear on all pages.

There are many powerful Ad Management Plugins and Solutions for WordPress — you might better check this article from WPBeginner.