Communication interfaces are systems that enable different devices or software to exchange information. They define the methods and protocols used for this interaction, ensuring that data is transmitted accurately and efficiently. Common examples include USB for connecting peripherals, Bluetooth for wireless communication, and HTTP for web data transfer. These interfaces can be hardware-based, like serial ports, or software-based, like APIs (Application Programming Interfaces). They play a crucial role in technology, allowing diverse systems to work together, share resources, and enhance user experiences across various applications and devices.