Research

10 min read

What Core Web Vitals really cost you

We compared 11,800 sites. Slow pages rank a little lower and convert a lot worse. Here's where the money is.

Maya Okafor

Head of search research

Speed is a small ranking factor and a large business one. Across our sample, pages with a largest paint over 4 seconds ranked 1.3 positions lower on average and converted 29% worse.

Start with images

On 64% of slow pages the largest element was an image that was bigger than it needed to be. Resizing and modern formats fixed most of them in one pull request.

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