Which type of ad typically appears between user interactions on a webpage?

An interstitial ad is a type of advertisement that is designed to appear between user interactions on a webpage, effectively taking up the whole screen and requiring the user to consciously dismiss it before continuing to their desired content. This format is particularly effective for capturing user attention because it appears during transitions, such as when a user navigates from one page to another.

Interstitial ads can enhance user engagement, as they are full-screen ads that are often visually striking and allow for dynamic content, including video and animations, which can be more memorable than static ads. The timing and placement of interstitials make them a powerful tool in digital advertising, even though their usage should be balanced to avoid negative user experiences, like annoyance or increased bounce rates.

The other types of ads listed serve different purposes; for example, a roadblock ad typically covers multiple ad placements simultaneously on a page to ensure visibility, while banner ads are smaller and usually placed in designated areas of a webpage, and a full-screen ad generally captures the complete screen but isn't specifically tied to actions between user interactions.