What it is
A chatbot answers. An agent acts. Give an agent a goal, like find three vendors that fit this brief and start a contact form, and it plans the steps, visits sites, reads what it finds, and works through the task. Underneath, it is a large language model wired up to tools: a browser, a code runner, an API, or a connector like MCP.
Why it matters
Agents are the sharpest edge of the AI systems audience. They do not see your design. They read your structure, your headings, your schema, and the underlying HTML, then decide whether they can finish the task on your site or move on to one they can parse. If your forms, navigation, and content are only legible to a human eye, an agent shopping on your customer's behalf will pass you over.
What to do
Make the machine-readable layer match what people see. Use semantic HTML and clearly labeled forms, put key facts in text rather than trapped in images, and keep your schema accurate. Treat agentic web development as a real requirement, not a someday item. Run WAIO Engine to check whether an automated visitor can actually read and act on your pages.