B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
18%
18% -- click through rate lift percentage for Email preview texts including a clear benefit and call-to-action (2025)
Email previews that include a clear benefit and call-to-action achieve up to an 18% increase in click-through rate according to Contra's 2025 analysis.
- Reported as an upper bound ('up to 18% increase')
- Baseline click-through rate not provided
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
18%
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
50
Source Trust
50
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Contra
Primary
Tier C
https://www.disrupt.co.kr/en/blog-post/your-subject-line-makes-or-breaks-your-results-the-two-lines-… ↗
Source Article
Email Subject Lines Are Everything Now: The Two Lines That Will Define Your 2025 Open Rates
Email marketing in 2025 is evolving into a channel that demands a more precise strategy than ever before. With rapidly shifting consumer behavior, mobile-first content consumption, and algorithm-driven filtering all converging, achieving meaningful results through simple one-off campaigns has become…
Original Research
Contra
· Original study ↗
Methodology
Reported as 'up to 18%' — an upper-bound relative increase in CTR; baseline and exact range not specified. Attributed in article to 'Contra's 2025 analysis', cited secondhand via DISRUPT blog.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Email preview texts including a clear benefit and call-to-action: 18% click through rate lift percentage. Source: Contra (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/contra-preview-benefit-cta-ctr-increase
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<blockquote cite="https://lighthousedata.io/data/contra-preview-benefit-cta-ctr-increase" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>18%</strong> -- click through rate lift percentage for Email preview texts including a clear benefit and call-to-action<br><small>Source: Contra (2025) · <a href="https://lighthousedata.io/data/contra-preview-benefit-cta-ctr-increase" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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