`std::bind` is a function template in the C++ Standard Library that allows you to create a new function by binding some arguments to an existing function. This is useful for simplifying function calls, especially when you want to fix certain parameters while leaving others flexible. It can be particularly helpful in scenarios like callbacks or when working with algorithms that require function objects. When using `std::bind`, you specify the function you want to bind along with the arguments you want to fix. The result is a callable object that can be invoked later with the remaining arguments. This feature enhances code readability and reusability, making it easier to work with functions in a more modular way.