Google Discover
Image requirements for large card previews
1200 px
minimum image width
300K px
minimum total pixels
<meta name="robots" content="max-image-preview:large">
1200px + meta tag
+45% CTR
Original vs stock images
+79% CTR
Large previews in regular search
+20–50% CTR
Avoid
Stock photos
Under 1200 px
No meta tag
Use instead
Original images
16:9 · 1280×720+
Custom visuals