Frontend & browser·Performance and Core Web Vitals
the first text or image appeared, so the user finally knew the page was alive.
First contentful paint
Also calledFCP
The moment anything from the DOM is painted — any text, image, canvas or non-white background. It answers 'is it working', which is a different question from 'can I see what I came for'. It is driven almost entirely by time to first byte plus render-blocking resources, which makes it the metric most improved by removing things from the head.