A marketer notices the bidder is using a different measurement source than the CFO and CEO's internal CRM. Why is this source alignment critical?

Source alignment is critical because it ensures everyone involved, from the bidder to the CFO and CEO, is working towards the same understanding of success and using consistent data to measure it. If the bidder uses a different measurement source, their optimization efforts might be based on metrics that don't align with the organization's true business goals or financial reporting, leading to misaligned strategies and potentially suboptimal outcomes. It doesn't automatically increase Quality Score; Quality Score is influenced by ad relevance, expected click-through rate, and landing page experience. It also doesn't reduce the need for confidential computing or prevent the use of auction-time signals, as these are technical aspects unrelated to measurement source consistency.