B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
62%
62% -- correlation strength of difficult words vs declining conversions for landing pages (2025)
The correlation between difficult words and declining conversion rates is 62% stronger compared to 2020.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
62%
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
20
Independence
30
Methodology
45
Freshness
95
Source
Unbounce
Primary
Tier B
https://kirro.io/how-to-optimize-conversion-rate ↗
Source Article
How to optimize conversion rate (data-backed)
To optimize your conversion rate, start with your value proposition, then simplify your copy, speed up your pages, remove form friction, and test every change. That’s the order. Not because it sounds nice, but because research across 20,000+ pages shows these five areas have the biggest impact, in t…
Original Research
Unbounce
· Original study ↗
Methodology
Unbounce analysis; comparison vs 2020 baseline
Methodology documented
Segmentation
IndustryB2B
RoleSEO Specialist
Channelcontent
Cite this stat
Plain Text
landing pages: 62% correlation strength of difficult words vs declining conversions. Source: Unbounce (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/unbounce-difficult-words-correlation-62
HTML Embed
<blockquote cite="https://lighthousedata.io/data/unbounce-difficult-words-correlation-62" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>62%</strong> -- correlation strength of difficult words vs declining conversions for landing pages<br><small>Source: Unbounce (2025) · <a href="https://lighthousedata.io/data/unbounce-difficult-words-correlation-62" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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