Why is your website loading slowly?
What Google measures, the usual causes of slow pages, and how to run a free test and turn the results into a short fix list.
What you’ll learn
- What the three Core Web Vitals measure
- How to run a PageSpeed Insights test
- How to read the results without the jargon
- The usual culprits, and who fixes them
Why it matters
People leave slow pages, and Google uses real-world speed on phones as one of the signals it ranks websites by.
What Google measures
Google’s Core Web Vitals look at three things: how fast the main content appears (LCP, under 2.5 seconds is good), how quickly the page responds to a tap (INP, under 200 milliseconds) and how much the layout jumps while loading (CLS, under 0.1).
Free with an account
Keep reading. It’s free.
Create a free Site Desk account to read the full lesson and every lesson in all four paths, use the Implementation Lab and keep your progress on every device.
Still to come in this lesson
- Run the test
- The usual culprits
- Turning results into fixes
- A real-world example
- Your toolbox: 1 copy-and-paste template and 1 free tool
- Implementation Lab: Website Performance Review
- Verification checklist
- Common mistakes, quick answers and a printable resource
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