Using third-party tools to check if your ads are seen can help you avoid wasting money. Sometimes, your ad might load on a page, but nobody actually sees it. This happens a lot when ads appear at the bottom of a site or on fake traffic pages. These tools give you reports showing how often your ad was really visible to a person, not just loaded on a page. This helps you understand what placements are working and which ones are just spending your budget. It's also useful for comparing different traffic sources and making smarter decisions. Does anyone have thoughts on how they’ve used these tools to improve their results?