Managing file operations in programming is crucial for ensuring that applications run smoothly without hitting resource limits. When handling multiple files, it's essential to close them properly after use, a practice known as "always be closing" (A.B.C). The Go programming language provides an effective solution for this using the `defer` keyword, which ensures that resources are released even if a function exits prematurely. By deferring the closure of files, developers can prevent issues related to exceeding the maximum number of open files, thus avoiding runtime errors and maintaining cleaner code. This lesson highlights the importance of proper file management, illustrates the utility of the `defer` statement in Go, and discusses best practices for error handling when closing files, ultimately leading to more robust and efficient applications.