The technology that underpins smart assistants primarily includes natural language processing (NLP), machine learning, and AI algorithms. These technologies enable smart assistants, like Siri or Alexa, to understand, interpret, and respond to user queries in a conversational manner. They leverage vast datasets to improve accuracy and relevance in responses over time. Additionally, integration with various devices and APIs allows smart assistants to control smart home features, provide information, and perform tasks, enhancing user convenience and streamlining daily activities.