Stack allocation is a method of managing memory in computer programming where data is stored in a region called the stack. This area of memory is organized in a last-in, first-out (LIFO) manner, meaning that the most recently added data is the first to be removed. When a function is called, its local variables are allocated space on the stack, and when the function exits, that space is automatically freed. One of the main advantages of stack allocation is its speed. Since the memory is managed automatically, there is no need for complex memory management techniques, making it efficient for temporary data storage. However, stack allocation has limitations, such as a fixed size, which can lead to stack overflow if too much data is allocated.