What metric is MOST indicative of sponsored content's ability to attract new customers to your brand?

New customer acquisition cost (CAC) directly attributable to the sponsored content is the MOST indicative metric of its ability to attract new customers. While engagement metrics like views, shares, and comments are useful, they don't directly quantify new customer acquisition. Similarly, website traffic can be misleading if it's primarily driven by existing customers. New customer CAC, calculated by dividing the total cost of the sponsored content campaign by the number of first-time customers acquired as a direct result of that campaign, provides a clear measure of the campaign's efficiency in attracting new business. For example, if a sponsored content campaign cost $10,000 and resulted in 500 new customers, the new customer CAC would be $20. This KPI focuses solely on the efficiency of the sponsored content in bringing in completely new individuals to the brand's customer base.