B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
20%
20% -- organic traffic decline for affected websites (2026-03)
Some websites reported organic traffic declines between 20% and 35% during the first week of Google's March 2026 core update.
- Early self-reported data from the first week of the rollout
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
20%
Unit
Percentage
Data Vintage
2026-03
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
Rank My Business
Primary
Tier B
https://rankmybusiness.com.au/google-launches-march-2026-core-update/ ↗
Source Article
Google Launches March 2026 Core Update
Mar 30, 2026
Google has officially launched its first broad core update of 2026, and the SEO community is paying close attention. Announced early on March 27, 2026, the March 2026 core update is part of Google’s ongoing effort to improve search quality. If you’ve noticed ranking shifts or traffic fl…
Original Research
Rank My Business
· Original study ↗
Methodology
Range 20-35%; midpoint extracted. Traffic drops in first week of March 2026 core update
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
affected websites: 20% organic traffic decline. Source: Rank My Business (2026-03). Via Lighthouse Intelligence -- https://lighthousedata.io/data/organic-traffic-drops-march-2026-update
HTML Embed
<blockquote cite="https://lighthousedata.io/data/organic-traffic-drops-march-2026-update" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>20%</strong> -- organic traffic decline for affected websites<br><small>Source: Rank My Business (2026-03) · <a href="https://lighthousedata.io/data/organic-traffic-drops-march-2026-update" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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