What changed in Google Search Console on April 3, 2025?

Google corrected an under-counting bug in how Search Generative Experience and AI Overview impressions were logged. Many sites saw a sudden rise in reported impressions, with clicks largely unchanged, which made CTR appear to fall off a cliff. The traffic did not change. The measurement did.

Did my actual traffic drop on April 3, 2025?

Almost certainly not. If your raw click count and analytics sessions are flat across the date boundary but GSC impressions stepped up sharply, you saw a measurement correction, not a traffic loss. The CTR ratio looks worse because the denominator was corrected, not because the numerator fell.

How do I re-baseline CTR after the correction?

Treat April 3, 2025 as a hard cut. Build separate CTR baselines for pre-April-3 and post-April-3 data. Do not compare year-over-year CTR across the boundary without normalizing. Search Console Tools auto-detects the cut and applies a post-fix CTR curve so the dashboard does not show fake decline.

Should I be alarmed if my CTR looks lower in 2026?

If the apparent CTR decline started in early April 2025 and your click count is steady, no. If it kept declining through late 2025 and 2026, that is real — and is almost always driven by AI Overview impressions being counted at the top of the SERP. See our AI Click Recovery use case for how to isolate the AI Overview share.

Does the April 3 fix affect position data?

Average position is also affected indirectly: the additional impressions logged were typically AI Overview placements at high positions, which can push reported average position slightly up. The underlying ranking did not change; only the impressions that were always there are now being counted.

SCT / USA: ready

GSC_FIX_2026 · VER 1.1 · LIVE

The April 3, 2025 Correction

How to Fix Your GSC Impressions in 2026

Your CTR did not collapse. Google corrected an under-counting bug. Here is how to re-baseline, isolate the artifact, and stop reporting fake decline.

April 3

2025 Cut Date

-30%

Typical Apparent CTR Drop

Actual Traffic Lost

The summary, in one paragraph

On April 3, 2025, Google fixed a known under-counting bug in how AI Overview and SGE impressions were logged in Search Console. Sites that did nothing wrong saw impressions step up sharply while clicks held flat — making CTR look like it had collapsed by 20-40% overnight. The traffic did not change. The denominator did. If you have been reporting CTR decline year-over-year against a pre-April-3 baseline, your report is wrong.

The 4-step re-baseline

Step 1

Cut the timeline

Treat April 3, 2025 as a hard cut. Build two CTR baselines: pre-cut and post-cut. Do not compare across the boundary without normalizing.

Step 2

Confirm clicks are flat

If your raw click count and analytics sessions are steady across the date boundary, you saw a measurement correction, not a traffic loss.

Step 3

Re-anchor expected CTR

The post-fix CTR curve is roughly 30% lower at every position. Update internal CTR targets and dashboards to the new curve.

Step 4

Isolate AI Overview share

The new impressions are mostly AI Overview placements. Separate them from blue-link impressions so the rest of your CTR analysis stays clean.

What Search Console Tools does automatically

Auto-detects the April 3, 2025 step-change in your data and labels it on every chart.
Applies pre/post baselines to CTR analysis so striking-distance scoring is not skewed by the artifact.
Flags pages where the AI Overview impression share is now >50% so you can deprioritize those queries.

New Guide

The 3-Part Data Integrity Audit

Day 1: The Impression Correction. Day 2: AI Answer-to-Click Ratio. Day 3: The 5 strike-distance queries one title tag away from page 1 on your site.