JavaScript's concurrency model is built around the concepts of the Call Stack and the Event Loop, which together enable asynchronous programming in a single-threaded environment. This blog explores how the Call Stack manages function execution, how the Event Loop orchestrates asynchronous callbacks, and how these components interact with the Message Queue and Web APIs. Through clear explanations and practical code examples, readers will gain a solid understanding of JavaScript's runtime behavior, empowering them to write more efficient and predictable code.