Pragmatics is the study of contextual meaning and how more is communicated than what is explicitly said. It examines invisible meanings, inferences, and assumptions that arise from linguistic and physical context. Key aspects of pragmatics include deixis, which are expressions like pronouns that depend on context to be understood, and speech acts, such as requests, that depend on context and politeness conventions. Politeness aims to save face by mitigating threats to people's self-image and sense of independence or belonging.