A Call to Action is any element — button, link, headline, or instruction — designed to prompt an immediate response from the user. Effective CTAs are specific, action-oriented, and aligned with the user’s stage in the buyer’s journey. Examples include ‘Schedule a Free Consultation,’ ‘Download the Guide,’ or ‘Get a Quote.’ CTA placement, design, wording, and relevance all significantly impact conversion rates and should be tested as part of any CRO strategy.