A visual or textual element that encourages the user to perform a specific action, such as clicking, buying, registering, or contacting. It can take the form of a button, a link, or a short message. A good CTA should be clear, visible, and aligned with the conversion goal.
Use case: On a product launch landing page, a red “Request a sample” button has been integrated at the top of the page to encourage action as soon as the user arrives.