Check traffic-message match
If the page promise does not continue the ad or link promise, design changes are unlikely to solve the core problem.
Clarify the offer
Visitors should know what they get, who it is for and what happens after the CTA.
Reduce unnecessary friction
Shorten forms where possible, fix mobile usability, clarify risk and remove distracting choices.
Prioritize evidence
Use analytics, form data, heatmaps, recordings or customer feedback to form hypotheses, then validate with testing where traffic allows.