Google began rolling out its March 2025 broad core update on March 4, with the rollout completing approximately 15 days later. As with all core updates, significant ranking volatility was observed across many niches — particularly in health, finance, and media.

What is a core update? Google's broad core updates are significant changes to its ranking systems that affect search results globally. They don't target specific sites or spam tactics — they reflect Google's reassessment of what constitutes "helpful, reliable, people-first content."

What We Observed

Based on our analysis of ranking data across thousands of domains, several patterns emerged from the March 2025 core update:

Winners

  • Original reporting and journalism — Sites with first-hand reporting and bylined articles from identifiable subject-matter experts saw notable gains.
  • User-generated content communities — Forums and community Q&A sites (including Reddit and niche forums) continued their strong performance from recent updates.
  • Established e-commerce brands — Well-known brands with strong E-E-A-T signals gained positions in competitive product queries.
  • Localised content — Content specifically tailored to geographic markets performed better in local and regional queries.

Losers

  • Thin affiliate sites — Sites with primarily thin review content and heavy affiliate linking continued to lose visibility.
  • AI-generated content farms — Sites relying on mass AI-generated content without editorial oversight saw significant drops.
  • Aggregator sites — Sites that primarily aggregate and reformat content from other sources without adding unique value declined.

Key Themes from This Update

E-E-A-T Signals Strengthened

Experience, Expertise, Authoritativeness, and Trustworthiness (E-E-A-T) signals appear more prominent in this update. Sites with clear author credentials, transparent editorial policies, and demonstrated first-hand experience performed better than those without.

Content Depth vs. Content Volume

Sites focused on producing fewer, more comprehensive pieces tended to outperform those pursuing high-volume, shallower content strategies. This aligns with Google's stated preference for "helpful content" over keyword-optimised filler.

Core Web Vitals Correlation

Sites with strong Core Web Vitals scores appeared to experience more stability during the rollout, while sites with poor performance metrics saw amplified losses. While CWV remains a minor ranking factor, this update suggests it may now interact more meaningfully with content quality signals.

How to Respond

If your site was negatively affected by this update, Google's guidance is consistent: focus on improving the overall quality and helpfulness of your content rather than looking for quick technical fixes. Core updates reward long-term investment in content quality.

  • Audit your content for depth and genuine usefulness.
  • Add author bios and credentials to key content pages.
  • Remove or substantially improve thin or outdated content.
  • Ensure your site's editorial and review policies are clearly communicated.
Note: Core update recoveries typically take months and often only show results after the next core update. Patience and sustained content improvement is the right long-term strategy.