Interface refers to the path for communication between two components. Interfacing is of two types, memory interfacing, and I/O interfacing.
Memory Interfacing occurs when we need the microprocessor to access the memory for reading instruction codes and the data stored in the memory.
IO Interfacing indicates the various communication devices like the keyboard, mouse, printer, etc. When we need to interface the keyboard and other devices with the microprocessor by using latches and buffers. This type of interfacing is known as I/O interfacing.