While reviewing campaign reports, Sal notices that the last email campaign had low click-through rates. What could he do to optimize and improve performance?

Low click-through rates (CTR) indicate that recipients are opening the email but not engaging with its content. A/B or multivariate testing on content layout helps identify which presentation of information is most effective at driving clicks. Adding a product recommendation content block directly addresses engagement by offering relevant, clickable content that highlights products, thereby increasing the likelihood of a click. Testing subject lines is important for improving open rates, not directly for improving click-through rates once the email is opened. Event tagging is for tracking actions after a click or within the email, not for directly improving the CTR itself.