The primary difference between Stack and Queue Data Structures is that Stack follows LIFO while Queue follows FIFO data structure type. LIFO refers to Last In First Out. It means that when we put data in a Stack, it processes the last entry first. Conversely, FIFO refers to First In First Out. It means that when we put data in Queue, it processes the first entry first. Let us understand further the differences between them. 

Stack data structures are useful when the order of actions is important. They ensure that a system does not move onto a new action before completing those before.

While Queue is used when things don’t have to be processed immediately, but have to be processed in First In First Out (FIFO) order.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence