Cambridge English: Proficiency, also known as C2 Proficiency, is an advanced English language examination offered by Cambridge Assessment English. It assesses a candidate's ability to communicate effectively in English at a high level, suitable for academic and professional settings. The exam tests four key skills: reading, writing, listening, and speaking. Achieving a C2 Proficiency certificate demonstrates that a person can understand and produce complex language, making it a valuable qualification for higher education and career opportunities worldwide.