Cognitive function refers to the mental processes that allow us to think, learn, remember, and solve problems. These functions include attention, memory, language, perception, and reasoning. They are essential for everyday activities, such as making decisions, understanding information, and interacting with others. Cognitive function can be influenced by various factors, including age, education, and overall health. Conditions like Alzheimer's disease or dementia can impair cognitive abilities, while engaging in activities like reading or puzzles can help maintain and improve them. Understanding cognitive function is important for promoting mental well-being and enhancing quality of life.