Will viewers click your thumbnail?

How the thumbnail CTR predictor works

AI Vision looks at your thumbnail the way a scrolling viewer does — in half a second — and scores the four things that decide whether they tap.

• Visual impact — Does it grab the eye instantly on a small screen — contrast, composition, a clear main subject.
• Readability — Are the text and facial expression legible on mobile, or too small and cluttered.
• Curiosity — Does it open a loop that makes people want to click — without cheap clickbait.
• Relevance — Does the thumbnail accurately hint at the topic so the right viewers click.