A Process Scheduler is a component of an operating system that manages the execution of processes. It determines which process runs at any given time, ensuring efficient use of the CPU. By prioritizing tasks based on various algorithms, the scheduler helps maintain system responsiveness and performance. The Process Scheduler uses different scheduling algorithms, such as First-Come, First-Served and Round Robin, to allocate CPU time to processes. It keeps track of process states and transitions, allowing for multitasking and resource sharing among multiple applications. This functionality is crucial for maintaining a smooth user experience on computers and devices.