A call to action, which is often shortened to CTA, is the part of a message that tells the reader what to do next. It could be something like "sign up now," "get your free guide," or "book a call today." Without a clear call to action, people often read or watch content and then move on without doing anything. The CTA removes any guesswork and tells the person exactly what step to take. A good call to action is clear, short, and gives the reader a reason to act. It should also match what the person needs at that stage, not just what the business wants.