A call to action (CTA) is a prompt on a website that tells the user to take some specified action. A call to action is typically serves as a command or action phrase, such as ‘Sign Up’ or ‘Buy Now’. They generally take the form of a button or hyperlink. In digital marketing, it takes the form of the text on a button (a CTA button) or a web link and in email campaigns. In short, CTAs are often links to a webpage where the user can take further action.