In this video, we dive into the concepts of functions, focusing on understanding domain and range. We explore how to determine the domain and range of various functions using real-life examples, such as buying books online and calculating distances traveled by a car. We also discuss common pitfalls to avoid, like dividing by zero and dealing with square roots of negative numbers. By the end of this tutorial, you'll be equipped to calculate the domain and range of any function with confidence. Perfect for students and anyone looking to brush up on their algebra skills!