Call-to-Action is a prompt that tells users what action to take next, such as call, request a quote, download, or buy.
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
After describing a service, a button labeled ‘Request a project estimate’ tells visitors what to expect next. Its destination should actually begin that request rather than send them to an unrelated page.