focuses on how users move through and interact with a website.

Mobile first design requires developers to use responsive techniques to ensure the website or application looks good on different screen sizes.

The goal of mobile first design is to provide a better user experience on screens.

The refers to the extent to which a system can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction.

The is a technique used in user-centered interaction design to evaluate a product by testing it on users.

is information provided to the user about the outcome of their actions or the state of the system.

The is the point of interaction between the user and a computer system.