B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
8%
8% -- sales increase from lcp improvement for Vodafone (2026)
In a controlled experiment by Vodafone documented by web.dev, improving Largest Contentful Paint (LCP) by 31% resulted in an 8% increase in sales.
- Case study from a controlled experiment; not a universal formula for all stores
Attribution:
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Lighthouse Research Team
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Source verified
Evidence graded
Value
8%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
web.dev (Google)
Primary
Tier C
https://weaverse.io/blogs/shopify-headless-pricing ↗
Source Article
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They quote the build. They skip the CMS license. They pretend ongoing maintenance is optional. They present delivery estimates without defining the number of templates, integrations, markets, or migration work behind them.
This guide doesn't do t…
Original Research
web.dev (Google)
· Original study ↗
Methodology
Controlled experiment documented by web.dev, cited as evidence that performance can affect business outcomes
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Vodafone: 8% sales increase from lcp improvement. Source: web.dev (Google) (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/vodafone-lcp-sales-lift
HTML Embed
<blockquote cite="https://lighthousedata.io/data/vodafone-lcp-sales-lift" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>8%</strong> -- sales increase from lcp improvement for Vodafone<br><small>Source: web.dev (Google) (2026) · <a href="https://lighthousedata.io/data/vodafone-lcp-sales-lift" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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