The Common European Framework of Reference for Languages (CEFR) provides a common basis for describing language ability across Europe. It describes what language learners need to know and be able to do to use a language for communication. The CEFR defines six reference levels of language proficiency from A1 for basic users to C2 for mastery. It also outlines the grammatical structures and competencies required at each level. The CEFR takes a communicative approach, focusing on learners' needs and basing teaching on developing communicative competence through everyday interactions and cultural understanding.