A Programmable Logic Array (PLA) is a type of digital device used to implement combinational logic circuits. It consists of a programmable AND gate array followed by a programmable OR gate array, allowing users to customize the logic functions according to their needs. PLAs are versatile and can be configured to perform various logical operations. PLAs are often used in applications where specific logic functions are required, such as in embedded systems and digital signal processing. They provide a flexible solution for designing complex circuits without the need for multiple discrete components, making them efficient for prototyping and production.