ARIA, or the Accessible Rich Internet Applications, is a set of attributes that help make web content more accessible to people with disabilities. It provides additional information about elements on a webpage, allowing assistive technologies, like screen readers, to better interpret and interact with dynamic content. This is especially important for complex web applications that may not be easily understood by traditional HTML alone. By using ARIA, developers can enhance the user experience for individuals with visual, auditory, or cognitive impairments. It includes roles, states, and properties that define how elements behave and are presented, ensuring that all users, regardless of their abilities, can navigate and use web applications effectively.