Active vocabulary refers to the words that a person uses regularly in speaking and writing. These are the terms that come to mind easily and are employed in everyday communication. Active vocabulary is essential for effective expression and helps convey thoughts clearly. In contrast, passive vocabulary includes words that a person understands but does not use frequently. While both types of vocabulary are important for language development, active vocabulary is crucial for engaging in conversations and articulating ideas. Building an active vocabulary can enhance communication skills and boost confidence in language use.