What are windows in Apache Beam?
In Apache Beam, windows are an abstract concept used to control the time range for data processing. Windows divide the data stream into finite and ordered data blocks that can be processed and analyzed within a specified time range. Windows can be defined based on time, number of elements, or custom rules, and can be merged, split, or adjusted as needed. Windows help developers control the granularity and timing of data processing, enabling more flexible and efficient data processing and analysis.