Crystallized intelligence refers to the knowledge and skills that a person acquires through experience and education. It includes facts, concepts, and information that can be used in problem-solving and decision-making. This type of intelligence tends to improve with age, as individuals accumulate more experiences and learn from them. Unlike fluid intelligence, which involves the ability to think abstractly and solve new problems, crystallized intelligence relies on previously learned information. Examples include vocabulary, general knowledge, and the ability to apply learned skills in practical situations. It plays a crucial role in everyday tasks and professional activities.