Systemic Functional Linguistics (SFL) is a theory of language developed by Michael Halliday. It focuses on how language functions in social contexts, emphasizing the relationship between language and its use in communication. SFL views language as a resource for making meaning, rather than just a set of rules or structures. In SFL, language is analyzed through three main metafunctions: the ideational metafunction (representing ideas), the interpersonal metafunction (interacting with others), and the textual metafunction (organizing information). This approach helps to understand how language shapes and is shaped by social practices, making it a valuable tool for linguists and educators alike.