Hidden messages are pieces of information that are not immediately obvious and require careful observation or interpretation to uncover. They can be found in various forms, such as in literature, art, or even everyday communication. For example, an author might use symbolism to convey deeper meanings in their work, while an artist might incorporate subtle clues in their paintings. In the digital age, hidden messages can also appear in the form of cryptography, where information is encoded to protect its content. Additionally, steganography is a technique used to hide messages within other files, such as images or audio, making them invisible to the casual observer.