Sourceweb.dev (Google)
PublishedSeptember 1, 2021
TypeOfficial case study round-up
Sample19 company case studies
The short version: Speed improvements most often show up as engagement (pages per session, bounce rate) and revenue, more than as rankings.
What they studied
A Google round-up of companies that improved Core Web Vitals and reported business results.
Key findings
- Tokopedia improved LCP 55% and saw 23% longer average sessions.
- iCook improved CLS 15% and earned 10% more ad revenue.
- Yahoo! Japan saw a 15% uplift in page views per session.
- NDTV halved LCP and saw a 50% better bounce rate.
- Nykaa reported 28% more organic traffic from smaller cities.
Key learnings
- Speed improvements most often show up as engagement (pages per session, bounce rate) and revenue, more than as rankings.
- Pick the metric that matches your business model before you start, so you can show the result.
Things to keep in mind
- Selected success stories published by Google. Projects that showed no gain are not in the list.
- The page dates from 2021; Core Web Vitals have changed since (INP replaced FID in 2024).
Read it alongside
- Vodafone: 31% faster LCP, 8% more sales (web.dev (Google), 2021)
Source
Official case study round-up by Google, published by web.dev (Google), September 1, 2021.
We read the source and checked every figure on this page against it on October 13, 2026. Summaries and learnings are ours. Spotted an error? Tell us.
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