Cognitive functions are the mental processes that help us think, learn, remember, and solve problems. These functions include skills like attention, memory, language, and reasoning. They allow us to process information from our surroundings and make decisions based on that information. These functions are essential for everyday activities, such as reading a book, having a conversation, or planning a trip. When cognitive functions are strong, we can easily understand and interact with the world around us. However, factors like age, stress, or injury can affect these functions, making it harder to think clearly or remember things.