Voice commands are instructions given to a device using spoken language. They allow users to interact with technology hands-free, making tasks easier and more efficient. Common devices that utilize voice commands include smartphones, smart speakers like Amazon Echo, and virtual assistants such as Siri and Google Assistant. These commands can perform various functions, such as playing music, setting reminders, or controlling smart home devices. Voice recognition technology interprets the spoken words and translates them into actions, enhancing user experience and accessibility for individuals with mobility challenges.