Applied linguistics is the interdisciplinary study of language and its applications in the real world. It uses theories and findings from linguistics and applies them to practical problems involving language. Some key areas applied linguistics addresses include second language acquisition, language teaching methodology, language assessment, clinical linguistics concerning language disorders, and sociolinguistics regarding the relationship between language and society. The goal of applied linguistics is to understand and solve language-related issues in various contexts such as education, healthcare, law, and technology.