Google Analytics · Reporting

How to Create Custom Reports in GA4

GA4's standard reports rarely answer your exact question, which is where custom reports come in. Here is how to create them using the Library and Explore, the difference between the two, and how to build reports around what you actually need to know.

Updated: July 2026
Written by: Andrew Odgers, Managing Director
Reading time: 8 minutes
The short answer

Create them through the Library, to customise standard reports, or Explore, for bespoke analysis. The Library edits your navigation reports; Explore is a free-form workspace. Editing the Library needs editor access; Explore needs more general access. A good report answers one specific question with only relevant data. Custom reports organise data but do not change it.

Two routes to custom

How to create them, and Library versus Explore

You create custom reports through the Library, where you customise and publish standard reports, or through Explore, which builds bespoke analyses from scratch. Two routes suit two needs; because each tool has a purpose, the right one depends on how custom you need to be. The Library edits and organises the standard reports in your navigation, while Explore is a free-form workspace for deeper, custom analysis. One tailors, one explores; because they serve different depths, use the Library for tweaks and Explore for investigation.

CR 01

Library

Tailor standard reports.

CR 02

Explore

Free-form analysis.

CR 03

Answer one question

Relevant data only.

Access, good design and honesty

Access needed, what makes a good report, and an honest note

Editing the Library and publishing reports needs editor-level access, while Explore can be used with more general access to build your own views. Permissions vary by task; because roles control what you can change, check your access before customising shared reports. A good report answers a specific question with only the relevant dimensions and metrics, so it stays clear rather than cramming in everything. Focus beats clutter; because a report is a tool for a decision, design it around the question you need answered, often using custom dimensions. Custom reports only organise and present the data GA4 already collects; they do not alter or add to it. They are a lens, not a source; because they reshape the view rather than the data, you can build freely without risk to your figures.

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Frequently asked

Custom reports in GA4

How do you create custom reports in GA4?
You create them through the Library, where you customise and publish standard reports, or through Explore, which builds bespoke analyses from scratch. Two routes suit two needs. Because each tool has a purpose, the right one depends on how custom you need to be.
What is the difference between the Library and Explore?
The Library edits and organises the standard reports in your navigation, while Explore is a free-form workspace for deeper, custom analysis. One tailors, one explores. Because they serve different depths, use the Library for tweaks and Explore for investigation.
Do you need admin access?
Editing the Library and publishing reports needs editor-level access, while Explore can be used with more general access to build your own views. Permissions vary by task. Because roles control what you can change, check your access before customising shared reports.
What makes a good custom report?
A good report answers a specific question with only the relevant dimensions and metrics, so it stays clear rather than cramming in everything. Focus beats clutter. Because a report is a tool for a decision, design it around the question you need answered.
Do custom reports change your data?
No, custom reports only organise and present the data GA4 already collects; they do not alter or add to it. They are a lens, not a source. Because they reshape the view rather than the data, you can build freely without risk to your figures.