A call to action, usually shortened to CTA, is any element on a web page that tells the visitor what to do next. It's most commonly a button or link with clear, action-oriented text like "Get a Quote," "Book a Free Call," "Buy Now," or "Download the Guide."
CTAs are one of the most important elements on any website because they bridge the gap between a visitor browsing your content and actually doing something useful, like contacting you or placing an order.
Effective CTAs share a few traits. They use direct, specific language. They stand out visually from the rest of the page. They're placed where visitors naturally look (after key content sections, in the header, or as sticky elements). And they make it obvious what will happen when the user clicks.
"Contact Us" is a CTA. But "Get Your Free 15-Minute Website Audit" is a better one because it tells the visitor exactly what they'll get.