Spend based digital ad targeting and measurement

This invention describes a way for a company to understand its customers' online behavior without knowing their identity. The claims specifically describe transmitting a measurement file with a customer's ID to an ad network, and then sending both the customer's ID and an anonymous ad network ID to the customer's web browser when they visit the company's site. This setup allows the ad network to collect browsing data anonymously, which the company can then use to show targeted ads, potentially based on past purchases, and to identify similar potential customers.