Interstitial Ads are full-screen advertisements that appear at natural transition points in an app or website, such as between levels in a game or after completing a task. They typically cover the entire interface, making them highly visible to users. These ads can include images, videos, or interactive elements, and they often require users to close them to return to their content. These ads are designed to capture attention and can be effective for advertisers due to their prominent placement. However, they can also disrupt the user experience if not implemented thoughtfully, leading to potential frustration among users.