GA4 Custom Reports for SEO: The Complete 2026 Guide

GA4 Explorations replaces the custom report functionality from Universal Analytics. The Explorations module provides five analysis techniques: Free Form, Funnel Exploration, Segment Overlap, User Explorer, and Cohort Analysis. For SEO, Free Form and Funnel Exploration are the most immediately useful. This guide covers how to build each report type for organic search analysis, how to set dimensions and metrics correctly, and how to save and share reports with stakeholders.

The Free Form technique is a pivot-table-style report. Build an organic landing page performance report as follows:

1. Open Explore > Blank > Free Form.
2. Rows: Landing page + query string.
3. Columns: Session default channel group (with filter set to Organic Search).
4. Values: Sessions, New users, Key events, Total revenue, Average engagement time.
5. Apply a segment for Organic Search to the entire row.

This report shows every landing page that receives organic traffic, sorted by session volume. Sort by Key events descending to identify which organic landing pages drive conversions. Add a secondary dimension like Session source / medium to compare Google vs. Bing performance per landing page.

The Free Form technique guide covers row, column, and value configuration in detail.

Funnel Exploration lets you visualize how organic visitors progress through defined steps. To build an organic conversion funnel:

1. Select Funnel Exploration as the technique.
2. Set the segment to Organic Search.
3. Define steps as events or page views:
   • Step 1: session_start (all organic sessions)
   • Step 2: page_view on a specific landing page (e.g., /guides/)
   • Step 3: generate_lead or purchase
4. Choose between open funnel (users can skip steps) or closed funnel (users must follow steps in order).

The funnel reveals the exact drop-off between organic landing page views and conversion actions. If you see a large drop between Step 2 and Step 3, focus SEO content improvements on the transition pages.

Segment Overlap analysis shows how organic users intersect with users from other channels. For example:

• Segment A: Organic Search visitors
• Segment B: Direct visitors
• Segment C: Organic Search visitors who converted

The Venn diagram output reveals what percentage of converted organic visitors also arrived via Direct traffic. A high overlap indicates that organic visitors often return directly to the site before converting. This supports brand-building SEO strategies.

Cohort Analysis groups organic users by acquisition date and tracks their behavior over subsequent periods. Configure a cohort report:

1. Select Cohort Exploration.
2. Set include condition: Session default channel group = Organic Search.
3. Set returning condition: Any session (or specify an event like page_view).
4. Set cohort period: Weekly for 12 weeks.
5. Metric: User retention or Key events per user.

A declining retention curve for organic cohorts signals that your content attracts new visitors but fails to bring them back. Compare organic cohorts against email or direct cohorts to benchmark retention performance.

Google's Cohort analysis documentation explains how to interpret the retention matrix.

Explorations are private by default. To share: click the Share icon in the exploration and copy the link. Recipients need GA4 access to the same property. You cannot export explorations to PDF. Export the underlying data as CSV via the export button for use in Google Sheets or Looker Studio.

For recurring SEO reports, connect the exploration data to Looker Studio (formerly Google Data Studio) using the GA4 connector. This gives you scheduled email delivery and chart formatting that Explorations does not support.

GA4 Explorations provides the custom-reporting flexibility that standard reports lack. Free Form reports give you organic landing page performance by channel. Funnel Exploration tracks drop-off points in organic conversion paths. Cohort Analysis measures organic visitor retention. Export to Looker Studio for scheduled stakeholder distribution.

For reference on all exploration techniques, the Google Analytics Explorations overview covers each analysis type in detail.

Audit checklist: Verify at least one Free Form exploration exists for organic landing page analysis. Check that funnel explorations have correct step event names. Confirm cohort analysis uses weekly (not daily) periods for longer-term retention view. Test that saved explorations load correctly. Validate Looker Studio connection if used for scheduled reports.