👉 Deallocation is a process in software development where unused memory is released from a process or application. It's typically done to free up system resources and improve performance. In simpler terms, it involves freeing up unused memory that might be sitting idle in a system, like the stack of variables used by threads or the heap of data structures used by objects. Deallocating memory can be useful because it helps reduce memory usage, improves resource utilization, and makes the code more efficient. It's often done to