Usability testing is a critical process that evaluates how effectively, efficiently, and satisfactorily users can achieve their goals with a product or website, by focusing on core aspects such as user satisfaction, engagement, and error tolerance. It goes beyond mere ease of use, encompassing a range of factors captured by the 5Es: Effectiveness, Efficiency, Engagement, Error Tolerance, and Ease of Learning. This form of testing is essential for businesses, as it reduces bounce rates and ensures a competitive edge by identifying and resolving potential user experience issues before they impact customers. By examining navigation, design elements, and user interactions, usability testing aligns business decisions with real-world use, boosts product usability, and provides valuable feedback for improvements.