The function `std::random_shuffle` is a part of the C++ Standard Library, specifically included in the `<algorithm>` header. It randomly rearranges the elements in a specified range, allowing for the creation of a random permutation of a sequence. This function takes two iterators as parameters, marking the beginning and end of the range to be shuffled. However, it's important to note that `std::random_shuffle` has been deprecated in C++14 and removed in C++17. Developers are encouraged to use `std::shuffle` instead, which provides better randomness by allowing the use of a custom random number generator. This change enhances the quality of randomness in shuffling operations.