Client-server communication in software development can be managed through synchronous or asynchronous processing, each with distinct characteristics and benefits. Synchronous processing requires the client to wait for a server response before proceeding, leading to blocked execution and resource consumption. In contrast, asynchronous processing allows the client to continue other tasks without waiting for a response, promoting scalability and efficiency by freeing up resources and enhancing responsiveness. Asynchronous processing offers advantages such as better failure tolerance, quick response times, and parallel request execution. However, it necessitates architectural adjustments, such as integrating a message broker or using message queues and publish/subscribe systems to handle requests and responses efficiently. This results in a decoupled system that can be scaled for better performance, with tools like Hookdeck offering solutions for easy implementation of asynchronous processing.