The Software Development Life Cycle (SDLC) is a framework that outlines the steps and processes involved in the development of software. It is essential for successful software development because it helps organizations plan, design, develop, test, deploy, and manage the entire life cycle of a software product. SDLC ensures that all stakeholders are on the same page throughout the process, ensuring that any issues or changes can be addressed quickly. Moreover, SDLC also provides direction to developers by setting expectations and deadlines which leads to a better quality end-product.