Voice-activated devices are gadgets that respond to spoken commands, allowing users to control them hands-free. Common examples include smart speakers like the Amazon Echo and Google Nest, which can play music, set reminders, and answer questions. These devices use built-in microphones and voice recognition technology to understand and execute commands. These devices often connect to the internet and can integrate with other smart home products, such as smart lights and thermostats. Users can simply say phrases like "turn on the lights" or "play my favorite playlist," making everyday tasks more convenient and efficient.