API lifecycle management is a set of processes, policies, principles, and practices that allow owners to gain control over their API, from design through retirement. The stages of an API's lifecycle include design, development, publishing, monitoring, monetization, and retirement. Understanding the different stages of an API's lifecycle can help API publishers plan for the future and make informed decisions about their API. API lifecycle management is a key component of API management, which involves managing various components such as security, analytics, and monetization to effectively create, deliver, and manage APIs. By recognizing the relationships between these components and how they work together, API managers can create a more cohesive and effective API management approach.