There are three fixes that move a site's AI Visibility Score, and we keep coming back to the same list: serve real HTML, add a llms.txt, and add structured data. The first two have their own write-ups. This is the one about the third — the one people skip because it sounds like a developer chore, when it's often the difference between an AI reading your page and an AI understanding it.
What JSON-LD actually is (in plain terms)
JSON-LD is a small block of code you drop into your page — a