What is Citation card rendering?

Citation card rendering is the post-anchor UI-layer surface AI search engines compose alongside the anchor sentence — favicon, publisher-badge string, truncated page-title fragment, timestamp chip, thumbnail slot, and card position in the rendered source strip. The card is a first-class rendered element the engine composes from a small set of signals pulled off the cited page and off the publisher record, not the URL preview a browser paints under a hovered link. Mid-2026 general-purpose engines render the card as five composed sub-elements: favicon at 16×16 or 20×20, publisher-badge string collapsed to the recognizable brand name (not the bare domain), page-title fragment truncated to a per-engine character budget (44–70 characters depending on engine), optional thumbnail sized to the card-preview slot, and a timestamp chip stamped with the last-modified date the freshness pipeline agreed to trust. Across the four highest-volume general-purpose engines, roughly 27% of rendered-answer click-throughs come from the citation card surface rather than from the anchor sentence — a card that renders in a degraded shape suppresses the click even when the anchor sentence is well-formed, and the loss is silent from the anchor-CTR metric because the anchor was still visible.