OptionalpageLowercase letters and dashes, e.g. "product", "category", "cart", "checkout".
OptionalpostalThe postal code the site already knows (e.g. from the cart), for delivery questions. Max 10 characters.
OptionalproductThe product the shopper is looking at.
Where the shopper is. Lets the assistant answer "what are the measurements of this one?" on a product page. Unknown or malformed values are dropped by the server.