CTA is call-to-action, the visual or written prompt that guides users toward a desired next step.
It matters because a website is often the first serious evaluation point for a buyer. Good design reduces confusion, builds trust quickly, supports accessibility, and helps visitors take the next step without feeling pushed.
Example
A newsletter CTA could say ‘Get the monthly update’ beside a clearly labeled email field. The wording should describe the action and expected message frequency so visitors understand what they are choosing.