agent or intelligent agent

A web agent or an autonomous agent is a program that does things for you, such as filtering your e-mail or finding websites that suit your interests. Think personal assistant or shopbot. It's an automatic process and the program does its work independently, based on your preferences. You tell it what you want it to do, and then it reports what it finds. 

In the world of artificial intelligence, an AI agent also a software program, but it can independently plan, make decisions, and take actions to reach a specific goal. 

Unlike a chatbot, which only generates text or answers a single prompt, an AI agent operates in a continuous loop: it reasons about a problem, uses digital tools (like APIs, databases, and search engines, observes the results, and decides what step to take next until the job is finished.