In short. GA4 documents up to 10 applied segments per exploration, plus up to 10 visualizations and 10 filters per tab.
Definition: Google Analytics 4 (GA4) Explorations allows up to 10 applied segments in one exploration. Google documents a separate capacity of up to 10 visualizations in an exploration, with visualizations displayed in tabs.
Key facts
- Google's Explorations guide states: “You can apply up to 10 segments per exploration.”
- The same guide says that tabs display visualizations and that an exploration can contain up to 10 visualizations.
- Google also documents up to 10 filters per tab. This is a tab-level limit, while the segment ceiling applies to the exploration.
- Google's Segment builder documentation defines a segment as a subset of Analytics data used in Explorations.
- Google's traffic-source scope documentation says that Session source shows the most common sources for new sessions.
What is the segment limit?
The documented ceiling is 10 segments for one exploration. It is stated at the exploration level, so a source comparison should count all segments applied across that exploration. The limit section also lists 10 filters per tab as a separate constraint.
Google's Segment builder describes a session segment as a subset of sessions, including sessions that originated from a particular advertising campaign. A source comparison can therefore use session segments whose conditions select the source values being compared. The builder offers user, session, and event scopes, so the segment type should match the unit of analysis.
How does the tab limit affect a source comparison?
The exploration editor has a Variables panel and a Tab Settings panel. The Variables panel provides the dimensions, metrics, and segments available to the exploration. The guide says that a segment is applied by double-clicking it or by dragging it from Variables into Tab Settings.
The guide describes tabs as displaying visualizations and sets the exploration capacity at 10 visualizations. It separately sets the filter capacity at 10 filters per tab. These figures describe different objects: the segment count belongs to the exploration, the visualization count belongs to the exploration's tabs, and the filter count belongs to each tab.
For a source comparison, the configuration can be represented as follows:
Segment scope: Session
Condition: Session source
Apply: Tab Settings
This setup uses the source dimension at session scope. Google's traffic-source documentation says session-scoped dimensions show where new and returning users are coming from when they start new sessions, and that session-scoped dimensions use the “Session” prefix.
What should be counted when comparing sources?
Count each applied segment toward the exploration's total of 10, even when the segment is used on a particular source view. Count visualizations separately against the exploration's documented capacity of 10. Count filters separately for each tab, against the tab's documented capacity of 10.
The source comparison can use a Session source condition because the segment builder's session scope selects sessions and the traffic-source documentation defines Session source within session acquisition. A segment may contain selection criteria for a source comparison, while the tab controls where the resulting data is displayed.
Related terms
- How do I build a session segment for AI traffic in GA4 Explorations?
- How do I compare AI referral sessions by country in GA4?
- How do I compare AI referral behavior across devices in GA4?
- How can sampling be identified in a GA4 exploration?
FAQ
Can I apply 10 segments to each tab?
No. Google's limit is 10 segments per exploration. The tab-specific limit in the same documentation is 10 filters per tab.
Are 10 segments the same as 10 tabs?
No. Google describes tabs as displaying visualizations and limits one exploration to 10 visualizations. Segment capacity and visualization capacity are separate limits.
Which source dimension should I use for a session comparison?
Use Session source when the comparison concerns the source assigned to each session. Google defines it as a session-scoped dimension showing the most common sources for new sessions.
Sources
- Google Analytics Help, “Get started with Explorations”, undated
- Google Analytics Help, “Segment builder”, undated
- Google Analytics Help, “Scopes of traffic-source dimensions”, undated
Check how a page reads to answer engines. Open the GEO score analyzer