Effort expectancy refers to the ease of use associated with a particular system or technology. It measures how much effort a user believes is required to interact with a product, such as a software application or a device. Higher effort expectancy can lead to frustration and decreased usage, while lower effort expectancy encourages adoption and engagement. This concept is often studied in the context of technology acceptance models, which aim to understand how users perceive and interact with new technologies. By improving effort expectancy, developers can enhance user satisfaction and increase the likelihood of successful implementation of their products.