Why your link has no preview, and whether it matters

A WhatsApp link preview is built from the target page's Open Graph tags. If the page has none, or the crawler cannot fetch it, there is no preview - and no error either. The most common cause is a page that has never had the tags.

What the page needs

<meta property="og:title" content="Order #10432">
<meta property="og:description" content="Track your delivery">
<meta property="og:image" content="https://example.com/og.png">

The image should be a real URL on a host that answers unauthenticated requests, reasonably sized, and not behind a redirect chain. A tracking page that requires a session cookie will render no preview, because the crawler has no session.

Three reasons it silently fails

1. The page is behind auth. Order tracking pages usually are. The crawler sees a login screen.
2. The link is shortened. Some shorteners break the crawl, and a shortener in a template is a rejection risk on its own.
3. The preview was never requested. Some send paths do not generate one at all, and the message arrives as plain text with a blue link.

Whether it matters

Less than people think, and more in one case. For a transactional link to a customer who is expecting it - track your order - the preview adds almost nothing; they are going to tap it. For an unexpected link, the preview is the only thing standing between your message and looking like a phishing attempt.