Cognitive Load refers to the amount of mental effort being used in the working memory of a user when interacting with a system. In UX design, the concept is important because an interface that requires too much thinking or remembering can overwhelm users, leading to errors or abandonment. There are a few types of cognitive load, but in simple terms: when users have to recall information (like remembering a password or a previous step), learn a new concept (like an unfamiliar icon or term), or make complex decisions, their cognitive load increases. A good user-centered design strives to minimize cognitive load. For example, instead of asking users to remember a promo code, the system might automatically apply it (reducing memory load). Using clear labels and familiar icons reduces the learning load because users recognize patterns. Another example: chunking information into smaller sections (such as breaking a long form into multi-step form pages) can reduce the perceived complexity. Overall, by keeping interfaces simple, consistent, and providing helpful cues (like tooltips or defaults), designers can lighten the cognitive load, making it easier for users to process information and accomplish their goals without feeling mentally taxed.