Stream processing has become vital for modern data management, offering real-time insights for timely decision-making, but the complexity and cost of these workloads can be significant due to the continuous high data volumes. The document explores solutions for simplifying and optimizing stream processing, particularly through the use of Applications in DeltaStream. Applications allow for the consolidation of multiple processing statements into a single runtime job, thus enhancing resource utilization and reducing execution costs and latency by minimizing the I/O operations and network traffic usually associated with intermediate data storage. By employing Virtual Relations, the need to materialize intermediate results is eliminated, further optimizing the process. An example is provided, demonstrating how managing pageview data across two regions can be streamlined using this approach, resulting in a reduction of the number of streaming jobs needed. The document highlights the benefits of this method, emphasizing improved readability, reusability, and simplified debugging of complex computation logic.