OpenCL (Open Computing Language) is a software framework for programming parallel computing tasks across different platforms, including CPUs, GPUs, and FPGAs. It is used for high-performance computing tasks such as scientific computing, data analytics, and multimedia processing. OpenCL allows developers to write code that can run on a wide range of hardware devices, providing them with greater flexibility and efficiency in their programming tasks. Understanding OpenCL requires knowledge of computer architecture, parallel processing techniques, and programming languages such as C and C++.