Push notification ads and pay-per-view (PPV) ads differ in delivery and user engagement. Push notification ads are messages sent directly to a user's device, even when they are not actively browsing, often appearing as alerts or banners. They are designed to grab immediate attention and prompt quick action. In contrast, PPV ads appear when a user clicks on a specific link or visits a certain webpage, meaning the user initiates the interaction. PPV is more user-driven, while push notifications are more intrusive but can reach users anytime. PPV ads are typically used for targeted campaigns with higher intent, while push notifications are effective for re-engagement and time-sensitive offers. Both serve different roles in digital marketing strategies.