What should be included in a third-party tag to ensure accurate impression counting?

The correct answer is that A cache buster should be included in a third-party tag to ensure accurate impression counting. A cache buster is a unique identifier, typically added to the URL in the form of a random string or timestamp, which ensures that each impression is counted separately and that the third-party tracking tag is not cached by the browser. Without a cache buster, browsers or servers may cache the request, preventing accurate tracking of subsequent impressions and potentially skewing campaign data. By using a cache buster, advertisers can guarantee that each impression is recorded as a distinct event, ensuring the reliability of the reporting and analytics.