Processor affinity is the term used to define the relationship between a process and a particular CPU that it can execute on. Some of the synonyms for processor affinity are task binding, thread affinity, affinity scheduling, processor allocation, and CPU assignment. These synonyms represent the same basic concept of allocating a particular process or thread to a specific CPU. Processor affinity is particularly useful in applications with multicore CPUs, where the assignment of tasks to particular cores helps to improve performance by reducing overhead related to process switching and cache misses. Regardless of the term used, processor affinity is a crucial tool for optimizing application performance in modern computing environments.