Usability studies are research methods used to evaluate how easy and user-friendly a product, like a website or app, is for its intended audience. During these studies, real users perform specific tasks while observers watch and take notes. This helps identify any problems or areas for improvement, ensuring that the product meets the needs of its users. These studies often involve techniques such as user testing, where participants provide feedback on their experience. The insights gained can lead to better design choices, ultimately enhancing the overall user experience and satisfaction with the product.