B
Evidence Grade B
Graded
under review
Safe to Cite
Recent
9%
9% -- revenue lift from one star rating increase for businesses with online review ratings (2025)
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
9%
Unit
Percentage
Data Vintage
2025
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
75
Source Trust
60
Citation Chain
60
Independence
30
Methodology
45
Freshness
95
Source
Harvard Business Review
Primary
Tier B
https://reviewgrower.com/online-reviews-guide/ ↗
Source Article
The Ultimate Guide to Online Reviews: Best Practices for Customers and Business Owners - Reviewgrower
Online reviews have become one of the most important tools for establishing and maintaining consumer confidence as e-commerce has expanded. 95% of customers rely on reviews to judge a product’s worth or learn more about it, according to the Baymard Institute.
After photos, user reviews are the secti…
Original Research
Harvard Business Review
· Original study ↗
Methodology
Cited to Harvard Business Review research
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
businesses with online review ratings: 9% revenue lift from one star rating increase. Source: Harvard Business Review (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/one-star-rating-boost-revenue-9pct
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<blockquote cite="https://lighthousedata.io/data/one-star-rating-boost-revenue-9pct" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>9%</strong> -- revenue lift from one star rating increase for businesses with online review ratings<br><small>Source: Harvard Business Review (2025) · <a href="https://lighthousedata.io/data/one-star-rating-boost-revenue-9pct" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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