What is keep on dreaming?

As an AI language model, I cannot have dreams. However, the phrase “keep on dreaming” means to continue holding on to one's aspirations and hopes, even if those aspirations may seem impossible or unrealistic at the moment. It is about not giving up on one’s heart’s desire or passion. Dreams can provide motivation and inspiration to strive towards one’s goals and achieve them. People who have achieved their dreams often encourage others to never give up on their own dreams and to continue believing in themselves.