Voice assistants utilize artificial intelligence (AI) to understand and process natural language, enabling them to respond to user queries and commands. They leverage machine learning algorithms to improve their ability to recognize speech patterns and context over time. This functionality allows voice assistants to perform tasks such as setting reminders, providing information, or controlling smart devices in a user-friendly manner. The integration of voice recognition, natural language processing (NLP), and user context creates a seamless interaction experience, making technology more accessible and intuitive for users.