An AI agent goes beyond chatting to actually doing things. Given a goal, it can plan a sequence of steps, use tools like a web browser or a calendar, and carry the task forward without being told each move. Think of it as an AI that can not only answer questions but also roll up its sleeves and get work done.
For example, You ask an agent to book a dinner reservation, and it searches, compares times, and completes the booking for you.