A Priority Queue is a special type of data structure that stores elements in a way that allows for efficient retrieval based on priority rather than just the order of insertion. In a priority queue, each element is associated with a priority level, and elements with higher priority are served before those with lower priority. This makes it useful in scenarios like scheduling tasks or managing resources. Priority queues can be implemented using various data structures, such as heaps or binary trees. They are commonly used in algorithms like Dijkstra's algorithm for finding the shortest path in graphs, where the most urgent tasks need to be processed first.