Turbo Code is a type of error-correcting code used in digital communication systems to improve the reliability of data transmission. It works by encoding the data in a way that allows the receiver to detect and correct errors that may occur during transmission. This is particularly useful in environments where signals can be weak or noisy, such as in mobile phones or satellite communications. The key feature of Turbo Code is its use of two or more simple convolutional codes combined with an interleaver. This combination allows for better performance than traditional coding methods, making Turbo Codes highly effective for applications like 3G and 4G mobile networks, where maintaining data integrity is crucial.