Mobile ad viewability is a pivotal metric in mobile advertising, indicating the percentage of impressions that meet predefined industry standards for being seen by users for a minimum duration. This metric is crucial for advertisers as it allows them to evaluate the effectiveness and quality of their ad campaigns. Particularly for brand advertisers, mobile ad viewability ensures that ads reach genuine users instead of being wasted on fraudulent or bot-generated views. An ad is deemed viewable if it remains within the visible area of the browser or app for a specified duration.