Google Analytics 4 exports rich data, but standard metrics don't always match your business KPIs. Sometimes you need to clean up data parameters or group sources dynamically. This tutorial shows you how to create **Looker Studio custom dimensions for GA4** using custom calculated fields.
Using Calculated Fields in Looker Studio
Calculated fields allow you to manipulate parameters directly inside your reports:
- Group Traffic Channels: Group custom sources into clean categories (e.g., grouping `fb`, `facebook`, and `l.instagram.com` under a single "Paid Social" metric).
- Calculate Custom Conversions: Create formulas to calculate custom lead conversion rates (Conversions / Sessions).
- Clean URL Parameters: Remove query parameters to view clean page paths in your tables.
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Frequently Asked Questions (FAQs)
No, calculated fields only change how data is displayed within that specific Looker Studio report.
The CASE WHEN function in Looker Studio is the standard way to group and classify traffic sources.