An AI assistant is a digital application that employs artificial intelligence, including natural language processing (NLP) and machine learning, to interpret user inputs, automate tasks, and provide intelligent, personalized support through conversational interactions. Available in both consumer and enterprise contexts, AI assistants can handle tasks such as scheduling, answering queries, controlling devices, and data analysis. 

Leveraging technologies like large language models, AI assistants continuously improve their functionality, enabling smarter automation, enhanced productivity, and seamless integration across platforms and services.