A shared link is read as a title, a line of text and a picture. Render that card first and you catch the broken image and the cut-off headline before anyone else does.
When a link lands in a post, a message or a document, most people read the card and decide from there. The page behind it may be perfect; the card is what gets judged.
The four fields that build the card
A title and a description carry the words. An image carries the shape. A card type decides whether the picture appears large or small. Miss any one of them and a platform either guesses or falls back to a screenshot of the top of the page.
- Title: what the page is, in the words you would say out loud.
- Description: one sentence a person would want to read, not a keyword list.
- Image: an asset with a predictable centre, because platforms crop differently.
- Card type: large or summary, chosen to match the image you picked.
Render it before you share
The only reliable way to know how a card looks is to build it. Paste the values in, look at the result at the size the platform will use, and adjust the words until nothing important sits in the crop.
Check the platform that will actually show it
Cards are not identical everywhere. A summary card that reads well in a messenger can look thin in a feed, so check the layout the destination uses before you call the copy finished.
Common failures worth a second look
None of these need a redesign. They need one pass through a preview while the link is still in a draft.
- A title long enough that the platform truncates it in the middle of a word.
- An image that is square in your file and centre-cropped to something else everywhere else.
- A description that repeats the title instead of adding a reason to click.
- A canonical address that does not match the link you are sharing.