The `Flush()` method is commonly used in programming to ensure that any buffered data is written out to its intended destination. When data is processed, it may be temporarily stored in a buffer to improve efficiency. Calling `Flush()` forces the program to clear this buffer, sending the data to the output stream, such as a file or a network connection. In many programming languages, including C# and Java, `Flush()` is a part of input/output (I/O) operations. It is particularly important in scenarios where real-time data processing is required, as it helps maintain data integrity and ensures that no information is lost during transmission.