Final answer:
Elements in a priority queue are assigned with priorities which determine the order in which they are served, with higher priorities being served first.
Step-by-step explanation:
In a priority queue, elements are assigned with priorities. This means that each element in the queue has a priority level, and the queue operates such that the elements with higher priorities are served before those with lower priorities. This structure is an abstract data type with various applications in computer science, for example in scheduling processes within operating systems or in graph algorithms like Dijkstra's shortest path.