Tramly is a business focused on improving their conversion rate optimisation. Tasked with deciding which projects within Tramly are worth testing, Marisa is using the PIE framework to help make that decision. Which of the following questions would fit in with the PIE framework criteria?

The PIE framework stands for Potential, Importance, and Ease. "How valuable is the traffic to this page?" directly addresses the 'Importance' criterion, which evaluates the potential impact or value of a successful optimization. Understanding traffic value helps prioritize tests that could yield significant business results. The other options, while relevant to conversion optimization, don't directly align with the PIE criteria. "Why is one Google Ads campaign performing better than another campaign?" focuses on analysis rather than project prioritization. "Can the click-through rate be further improved for this ad?" is a specific optimization question, not a framework criterion. "Why is the majority of traffic to the site coming from mobile devices?" is an analytical observation, not a measure of potential, importance, or ease for a testing project.