Google completed the rollout of its March 2025 core update on March 20th — 15 days after it began. As with previous core updates, the volatility was significant, with some sites seeing traffic shifts of 30–60% in either direction within the first week.
We've spent two weeks analysing data across thousands of domains. Here's what the patterns show.
What Actually Changed
While Google rarely discloses the specifics of core updates, the patterns in the data tell a clear story. This update appears to have strengthened signals around three areas:
- Content originality — Sites with unique data, original research, and first-hand experience gained; "reformatted" aggregator content dropped.
- Author credibility — Pages with clear authorship and demonstrable expertise (aligned with E-E-A-T) saw ranking improvements across YMYL verticals.
- Topical depth — Sites covering fewer topics more thoroughly outperformed generalist content farms.
Who Got Hit Hardest
The verticals most affected were finance, health, and e-commerce product review sites — consistent with YMYL categories where Google applies stricter quality standards.
The most common profile of a site that dropped: high-volume content production with thin original value, minimal author bylines, and heavy reliance on affiliate links above the fold.
How to Recover
Recovery from a core update is rarely quick, but there are clear signals from previous updates about what works:
- Audit for content depth — Identify your top 20 traffic pages and evaluate whether they genuinely answer the query better than competitors. If not, they're candidates for improvement or consolidation.
- Add author credentials — Every content page should have a named author with a bio, linked social profiles, and evidence of expertise.
- Remove or merge thin pages — Use crawl data to identify pages under 500 words or with low engagement. Merge or 301-redirect where possible.
- Invest in original data — Surveys, studies, or unique datasets give your content a citation advantage that can't be easily replicated.
Historically, Google rewards recovery efforts at the next core update — meaning sites that make genuine improvements now should see gains when the next update rolls out (typically 3–6 months later).
Outlook
Based on patterns from the September 2024 and November 2024 core updates, we expect the next core update to arrive in Q3 2025. Sites that took a hit in March and fail to address underlying content quality issues are at risk of further drops.
The long-term direction is clear: Google continues to reward sites that demonstrate genuine expertise, provide original value, and serve user intent better than anyone else on a given topic. That's the endgame, and it isn't changing.