User acquisition optimization is the strategic process of refining how businesses attract and convert new customers. It's data-driven, focusing on maximizing ROI by improving efficiency and effectiveness throughout the acquisition funnel.
Usability refers to the ease with which users can learn and operate a product, system, or interface to achieve their specific goals effectively, efficiently, and with satisfaction. It is a critical attribute of user experience (UX) that focuses on how well a product serves its intended users and context of use.