CTA stands for "call to action." It's a key website element that prompts users to take a particular action, such as signing up for a newsletter, registering for a demo, or buying a product.

CTAs usually appear as a button or hyperlinked text and tend to be the most eye-catching element on a page. Their goal is to create a sense of urgency and encourage users to take the desired action. Examples of CTAs include "Sign up today," "Add to cart," and "Download for free," among others.