Hoare's Law of Garbage Collection states that "garbage collection is a form of automatic memory management." It emphasizes that the process of reclaiming memory that is no longer in use should not interfere with the program's execution. This principle ensures that programs can run smoothly without manual memory management, reducing the risk of memory leaks and other related issues. The law highlights the importance of designing garbage collection systems that operate efficiently and transparently. By doing so, developers can focus on writing code without worrying about memory allocation and deallocation, ultimately leading to more robust and maintainable software.