ELI5: Explain Like I'm 5

Microarchitecture

Microarchitecture is like an instruction manual that tells a computer how to operate. All computers have a central processor, or 'brain', where instructions are processed. Microarchitecture tells the computer's 'brain' how to do this by defining the types of instructions it can execute (called instructions set architecture), what kind of memory the processor can access, and many other important details. Think of the microarchitecture as a blueprint for how a computer works.