Voice-activated applications are software programs that allow users to interact with devices using spoken commands. These applications utilize speech recognition technology to understand and process voice inputs, enabling tasks such as sending messages, setting reminders, or searching the internet without needing to type. Common examples of voice-activated applications include virtual assistants like Siri, Google Assistant, and Amazon Alexa. These tools can perform various functions, from controlling smart home devices to providing weather updates, making everyday tasks more convenient and hands-free for users.