B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
25.79%
25.79% -- tracking accuracy improvement for Google Ads GCLID import (vs Enhanced Conversions for Leads) (2026)
A well-implemented GCLID import was found to be about 25.79% more accurate than Enhanced Conversions for Leads in a single-site A/B test.
- Results are from a single-site A/B test and may not generalize beyond one site
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
25.79%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
1
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
whatconverts.com
Primary
Tier C
https://www.whatconverts.com/blog/agency-call-attribution-portfolio-setup/ ↗
Source Article
Call Attribution for Agencies: Portfolio Setup Done Right
Original Research
whatconverts.com
· Original study ↗
Methodology
Single-site A/B test comparing well-implemented GCLID import against Enhanced Conversions for Leads; author cautions the result may not generalize beyond one site.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Google Ads GCLID import (vs Enhanced Conversions for Leads): 25.79% tracking accuracy improvement. Source: whatconverts.com (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/gclid-import-accuracy-vs-enhanced-conversions
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<blockquote cite="https://lighthousedata.io/data/gclid-import-accuracy-vs-enhanced-conversions" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>25.79%</strong> -- tracking accuracy improvement for Google Ads GCLID import (vs Enhanced Conversions for Leads)<br><small>Source: whatconverts.com (2026) · <a href="https://lighthousedata.io/data/gclid-import-accuracy-vs-enhanced-conversions" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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