A multimodal interface is a user interface that allows interaction through multiple modes of communication, such as text, voice, touch, and gestures. This approach enhances user experience by providing various ways to input and receive information, making technology more accessible and intuitive. For example, a smartphone can be operated using a touchscreen, voice commands, or physical buttons. These interfaces are commonly used in devices like smartphones, smart speakers, and virtual assistants. By integrating different modes, multimodal interfaces can cater to diverse user preferences and contexts, improving efficiency and engagement. This technology is increasingly important in fields like human-computer interaction and artificial intelligence.