Server-Side Rendering (SSR) has emerged as a crucial technique in optimizing the performance of web applications built with JavaScript frameworks. By shifting the rendering process from the client side to the server side, SSR offers significant benefits such as faster page load times and improved search engine optimization. However, implementing SSR comes with its own set of challenges and considerations. In this article, we delve into the impact of Server-Side Rendering on performance in JavaScript frameworks, exploring its advantages, drawbacks, best practices, and real-world case studies to provide a comprehensive understanding of this essential optimization technique.