Diagnosing an 80% organic-traffic collapse from 17 months of Search Console data

Search clicks had fallen steeply and the cause was unclear. Early readings pointed in different directions: a URL migration in which 95 old URLs mapped to 57 targets (24.9% recovery), and a third-party model estimating that a single article drove 40% of traffic.

Each explanation implied a different fix, so the first job was to find out which one the data supported.

• An archive of the full Search Console export: 17 months of clicks and impressions by date, page and query.
• Analysis that checks clicks, not only impressions. That check is what overturned two of our own repair recommendations.
• A weekly regression monitor with dated runs on 31 August and 7, 14, 21 and 28 September 2026, flagging page-level cliffs and decays.
• Technical repairs: five service pages that had returned HTTP 500 for ten months (a corrupted line from a bulk find-and-replace) and 16 malformed internal links across 15 posts.
• A gated content pipeline with word-count, citation and E-E-A-T checks. 107 articles were prepared (13 pillar, 94 supporting).

• Monthly clicks fell from 4,082 (May 2025, the peak) to 782 (August 2026): −80.8%. Across the 17 months: 35,504 clicks and 5,753,802 impressions.
• On 1 September 2026 the cause was resolved as algorithmic (the May 2026 core update and June 2026 spam update), not the URL migration.
• The model's "40% of traffic" article earned 34 clicks in 90 days in Search Console. What the data did show: queries naming individual people made up 60.9% of non-branded clicks.
• A baseline reporting zero non-branded rankings was an artefact of its seed keyword list. Measured data showed 429 ranked keywords, 24 of them non-branded in the top 20.
• The 28 September 2026 monitor run flagged 2 page cliffs and 96 page decays.

• Diagnosis and monitoring, not growth. The trend was still down at the last monitor run and we claim no traffic recovery.
• The 107 articles are unpublished, held pending a strategy decision.
• The client's Search Console data is not shared beyond these aggregates.