What is the exact role of Memory Management Unit?

Memory management is the process of managing the computer memory which consist of primary memory or secondary memory. In this, we allocate the memory portions to programs and software's after freeing the space of the computer memory. Basically, memory management is of critical importance for operating system because the multi-tasking can take place in the system which switches the memory space from one process to another.

The memory management function keeps track of the status of each memory location, either allocated or free. It determines how memory is allocated among competing processes, deciding which gets memory, when they receive it, and how much they are allowed. When memory is allocated it determines which memory locations will be assigned. It tracks when memory is freed or unallocated and updates the status.