`static_cast` is a type of casting operator in C++ that allows for safe and explicit conversion between compatible types. It is primarily used for converting between different data types, such as from an `int` to a `float`, or for upcasting and downcasting in class hierarchies. Unlike `reinterpret_cast`, `static_cast` performs compile-time checks to ensure that the conversion is valid, helping to prevent errors. Using `static_cast` can improve code readability and maintainability by clearly indicating the programmer's intent to convert types. It is a preferred method when the conversion is straightforward and does not involve complex type relationships, making it a fundamental tool in C++ programming for type safety.