How do you rank in ChatGPT?

You do not rank in ChatGPT, you get retrieved by it, so the goal is making your product facts findable, readable and trustworthy rather than climbing a position.

You do not rank in ChatGPT the way you rank in Google. There is no position to climb and no results page to move up. When someone asks for a product, the system assembles an answer from whatever it can find, understand and trust at that moment.

Three things decide whether you appear. It has to find the product in answer to a question that never mentions your brand. It has to understand the facts, which means typed attributes rather than adjectives buried in prose. And it has to trust the source, which means the price it quotes is the price you are charging today and the stock it promises is stock you actually have.

A page that looks complete to a person can still be invisible to retrieval. A person can read a specification table, click through to store availability and combine three things on screen. A retrieval system reads what is exposed to it and nothing else.