C1 Level refers to an advanced proficiency in the Common European Framework of Reference for Languages (CEFR). At this level, individuals can understand a wide range of demanding texts and express themselves fluently and spontaneously without much obvious searching for expressions. They can also produce clear, well-structured text on complex subjects. People at C1 Level can engage in discussions on various topics, using language flexibly and effectively for social, academic, and professional purposes. They can understand implicit meanings and recognize different styles and registers in language, making them capable of nuanced communication in diverse contexts.