Description: Windowing is a fundamental process in stream data processing that involves defining time windows to group events. This approach allows data processing systems to handle continuous streams of information by dividing them into more manageable and meaningful segments. Windows can be of different types, such as sliding windows, fixed windows, or session windows, each with specific characteristics that suit different analytical needs. By grouping events into windows, aggregate calculations such as sums, averages, or counts can be performed on the data that falls within each window. This is particularly useful in applications where data arrives in real-time, such as network monitoring, financial transaction analysis, or sensor data processing. Windowing not only improves processing efficiency but also enables analysts to gain more relevant and timely insights from real-time data, facilitating informed decision-making.