Is it a best practice to select multiple private marketplace deals on the same line item?

It is not a best practice to select multiple private marketplace (PMP) deals on the same line item. Each PMP deal often has unique characteristics, such as different floor prices, targeting parameters, or inventory sources. Combining them on a single line item makes it difficult to optimize performance effectively for each individual deal. For example, a higher bid required for one deal might overbid for another with a lower floor, leading to inefficient spending. Separating deals into their own line items allows for precise bid adjustments, budget allocation, and performance monitoring tailored to each deal's specific requirements, maximizing efficiency and achieving campaign goals.