Core Concepts
AI Agent
Also known as: agents, ai agents
In one line
An AI system that can take actions on your behalf — not just answer questions.
What does AI Agent mean?
An AI agent uses a language model as its "brain" plus tools (search, email, calendars, APIs) to complete multi-step tasks with limited human input. Agents differ from chatbots because they act, not just respond.
A real-world example
A sales agent that reads new leads from your CRM, drafts a personalised email, and books a meeting when the lead replies.
Related terms
Large Language Model (LLM)
A neural network trained on huge text collections to predict the next word — the engine behind ChatGPT, Claude and Gemini.
Chatbot
A conversational program that answers user messages, often powered by an LLM.
Tool Use (Function Calling)
Letting an AI trigger external tools or APIs — like calling a function in code.