The December 2024 spam update ran from 19 to 26 December 2024, taking 7 days. It launched one day after the December core update completed and over the Christmas period, which is unusual because Google has historically avoided shipping during the retail peak. Three confirmed updates ran inside five weeks, and this was the third.
Why the timing was unusual
Google has generally held back significant updates during late December, on the reasoning that retailers cannot respond during their busiest trading window. Shipping a spam update on 19 December broke that pattern, and it caught many ecommerce teams with reduced staffing and change freezes in place.
For a site that dropped during this window, the practical problem is that the usual response — diagnose, then fix — was unavailable for two weeks, and by the time teams returned the rollout was long finished and the trail was cold.
Separating this from the core update a day earlier
| If your data shows | Most likely cause | Measurement (what to check) |
|---|---|---|
| A step on 12 to 18 December | December 2024 core update | Broad loss across templates, no policy issue |
| A step on 19 to 26 December | This spam update | Loss on pages matching a published spam policy |
| One continuous decline across both | Treat as one period | Diagnose by scope rather than by date |
| Recovery in January | Seasonal, not algorithmic | Compare against the same weeks last year |
What spam updates actually enforce
Spam updates retrain SpamBrain against Google’s published spam policies. They do not reassess general content quality, which is why a site publishing its own original work is rarely involved. If nothing on your site engages a spam policy, a drop in this window is far more likely to belong to the core update the day before, or to seasonality.
Recovery from an algorithmic spam demotion does not wait for a scheduled update. The systems reassess continuously, so removing the violation typically shows results within two to eight weeks. The path is in spam update recovery.
Lost trading traffic in December 2024?
A core update, a spam update and the retail peak landed in the same fortnight, which is why this period is so often misdiagnosed. Send your Search Console access and I will tell you which it was.
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Traffic dropped around Dec 19, 2024?
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