This book provides a comprehensive introduction to Systemic Functional Linguistics (SFL), covering key concepts and contributions to the field and instructing beginners to apply SFL to different areas. Authored by contributors with extensive experience of teaching SFL, this book is composed of 14 chapters covering theories, descriptions, and applications of SFL. It encompasses the following topics: SFL theory and the organizing principles; descriptions of various lexicogrammatical and semantic systems; grammatical metaphor; register studies; different areas of SFL application, including translation studies, multimodal discourse analysis, and educational linguistics. Suitable to be used as teaching materials, the chapters are carefully organized into sections of learning outcomes, key terms, exercises, and suggested readings. By introducing the theory and applications of SFL in accessible terms and requiring no prior knowledge, this practical book is a key reading for students new to the area.