---
title: "Google core and spam updates"
slug: "core-updates"
category: "seo"
tags: ["seo", "google", "algorithm-updates", "core-updates", "spam-policies"]
status: "stable"
last_updated: 2026-09-27
summary: "How Google's broad core updates and spam updates work since 2018, the 2025 to 2026 rollout dates, the recovery guidance, and the themes current updates share."
related: ["[[seo/algorithm-history]]", "[[seo/helpful-content-update]]", "[[seo/e-e-a-t]]", "[[seo/ai-content-policies]]", "[[seo/ai-overviews]]", "[[seo/content-refresh]]"]
---

## Overview

Named filters like Panda and Penguin gave way to broad core updates in 2018, and since 2024 spam policies carry most of the targeted enforcement. This page covers that era: how a core update behaves, the recent rollout dates, and what the updates consistently reward. The earlier named updates are on [[seo/algorithm-history|Google algorithm history]].

## Treat a core update as a site-wide reassessment, not a penalty

Starting in March 2018, Google began running "broad core algorithm updates" several times a year. Each one re-evaluates content quality and authority across the entire index.

- Targeted: the relative ranking of every page, not a specific spam pattern.
- Effect: traffic can shift sharply in either direction during the rollout window, which has ranged from a few days to about four weeks (see the table below). Google treats a drop as a relative reassessment, not a manual action.
- Recovery: there is no quick fix. Google's official guidance is to improve content quality over time, using its helpful-content self-assessment questions. See [[seo/e-e-a-t]] and [[seo/helpful-content-update]].

## Track the 2024 to 2026 updates against the Search Status Dashboard

March 2024 paired a core update with three new spam policies: scaled content abuse (many unhelpful pages "no matter how it's created"), expired domain abuse, and site reputation abuse. Enforcement since then has run through regular core and spam updates listed on the Google Search Status Dashboard.

| Update | Rollout |
|---|---|
| March 2025 core update | Mar 13 to Mar 27, 2025 |
| June 2025 core update | Jun 30 to Jul 17, 2025 |
| August 2025 spam update | Aug 26 to Sep 22, 2025 |
| December 2025 core update | Dec 11 to Dec 29, 2025 |
| February 2026 Discover core update | Feb 2026, Discover only |
| March 2026 core update | Mar 27 to Apr 8, 2026 |
| May 2026 core update | May 21 to Jun 2, 2026 |
| June 2026 spam update | Jun 24 to Jun 26, 2026 |

Google's core updates documentation advises waiting at least a week after a rollout completes before comparing traffic, and says recovery can take until the next core update. Check the dashboard for anything newer; this table is a snapshot. For how these policies apply to AI-assisted sites, see [[seo/ai-content-policies]].

## Build for the themes current updates share

The 2024 to 2026 update cadence has converged on a small set of themes. New core updates extend rather than replace these.

- Content quality and helpfulness, scored at the site level, not the page level.
- First-hand experience and verifiable expertise; the E-E-A-T pillars apply across every editorial vertical.
- Spam policies against scaled content abuse (by AI or by people), expired-domain reuse, and, since 2026, back-button hijacking.
- Site reputation abuse: parasite SEO on high-authority domains gets demoted. Enforcement for results shown in the EEA changed in August 2026.
- Generative AI surfaces (AI Overviews and AI Mode) absorbing queries that used to drive featured-snippet clicks. See [[seo/ai-overviews]].

The practical implication is that the update playbook has not changed: ship original, well-edited, topically focused content from credentialed authors on a technically clean site. The names will keep changing; the underlying signals are consolidating.

## Related

- [[seo/algorithm-history]]; the named updates from Panda through the helpful content system
- [[seo/helpful-content-update]]; the helpful-content assessment now inside core ranking
- [[seo/e-e-a-t]]; the experience and expertise signals core updates reassess
- [[seo/ai-content-policies]]; how the spam policies apply to AI-assisted sites
- [[seo/ai-overviews]]; the AI surfaces absorbing informational queries
- [[seo/content-refresh]]; substantive updates versus date bumps after a drop