WG21 is the working group responsible for the development and standardization of the C++ programming language. It operates under the auspices of the International Organization for Standardization (ISO) and focuses on improving the language's features, performance, and usability. The group consists of experts from various industries and academia who collaborate to propose changes and enhancements. Their work results in new versions of the C++ standard, which are released approximately every three years, ensuring that the language evolves to meet modern programming needs.