A Programmable Logic Controller is an industrial computer used in the automation and control of any of various manufacturing processes. It does this with programmable logic that replaces traditional relay-based systems for greater reliability and flexibility. PLCs monitor inputs from sensors and control outputs to machinery, enabling real-time adjustments. They are at the core of industrial automation because they enhance efficiency, reduce downtime, and have real-time handling of data. Knowing how PLCs work and their advantages will have you optimizing your automation systems toward smoother and higher performances within manufacturing environments.