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Segment Overlap

Segment overlap is an analysis tool that visualizes up to three user segments in a Venn diagram in GA4 and compares intersection and difference users, and is used for audience definition and segment planning.

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Segment overlap exploration can quickly check ‘How many users meet these three conditions at the same time?’ For example, if you set up three segments, 'Mobile users', 'Organic search users', and 'Key event completion users', you can see at a glance how many users satisfy all three conditions.

It is useful for defining audiences and planning advertising segments. For example, it is used to specify 'users who are returning users and viewed a specific page' and define them as remarketing targets, or to reexamine the funnel design by discovering that there are fewer users than expected with multiple overlapping conditions.

Key takeaways

  • Visualize up to three segments as a Venn diagram to compare intersection and difference.
  • You can check the user counts and metrics for each segment and intersection area in table form.
  • It is used for defining audiences and planning advertising remarketing segments.
  • You can select a specific intersection area and analyze detailed metrics for those users.
  • GA4 Screen Location: Explore > Select ‘Segment overlap’ template.

References

Frequently asked questions

How do I link segment overlap to an ad?

If you discover a meaningful set of users in the intersection in the analysis, you can create an audience with that condition in GA4 and connect it with Google Ads to use it for a remarketing campaign.

Are the segment comparison features different for segment overlap and free-form exploration?

It's different. Segment overlap visualizes the intersection as a Venn diagram, and segment comparison in free-form exploration places two segments side by side in a dimension-and-metric table and compares the numbers.