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You do not write metadata for a Page. It is generated from the Item the Page is showing, every time the page is served: That covers the browser tab, the search-engine snippet, and the card that appears when someone pastes the Link into a messaging app or a work chat. Both OpenGraph and Twitter tags are emitted, so the major platforms all read the same values. The card is the large-image style when the Item has an image and the compact style when it does not. There is no per-Page override for any of it. If a link preview says the wrong thing, the fix is the Item’s name, description or image — which also means a good Item description does double duty as the preview text.

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Pages are noindex, follow

Every Page is served with instructions telling search engines not to index it, but to follow the links on it. The reasoning is worth knowing, because the first half surprises people who expected their pages to rank. A Collection of a thousand Items produces a thousand thin, near-identical pages — “Pump 4A”, “Table 12” — sitting on qrtub.com. Indexing those would dilute the domain rather than help anyone find anything, and none of them are pages a search visitor was looking for. Following the links keeps any link equity flowing outward to the sites the page points at. None of this affects scanning. Indexing directives are advice to crawlers; the page resolves normally for any person who scans the code, whether or not it is indexed. If you need a QR code to open something that does rank, point its Destination at a page on your own website rather than trying to make a QRtub Page indexable — see Direct Mode vs. Page Mode.

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Private Items get minimal metadata

A private Item reveals nothing to a crawler or a link preview. Its metadata is deliberately generic — the title reads “Private Item” and the description “Sign in to view this item” — and it is marked both noindex and nofollow. The Item’s real name, description and image never appear. So pasting a private Link into a group chat produces a bland card that gives away nothing about the equipment. See Page Privacy: Public vs. Private.

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Two other cases you may see

  • A printed Link that is not connected to anything yet gets its own placeholder metadata, titled “Unassigned Link”, and is kept out of the index for the same reason as everything else. A batch of pre-printed codes will not turn into a batch of indexed empty pages.
  • A Link that redirects rather than opening a Page has almost no metadata to speak of; there is no page to describe, only a redirect.