Custom Fields

Using Custom Fields

Where custom fields show up once created, how to use them in dashboards and goals, plus recipe ideas and best practices.

Once you've created a custom field, it's saved to your workspace and shows up automatically wherever you pick fields. This page covers where custom fields appear and how to get the most out of them.

Where Custom Fields Appear

Custom fields are workspace-level, so they're shared across your team and available everywhere the field pickers appear, no need to recreate them per report.

Custom metrics and dimensions appear in the metric and dimension pickers when you configure a dashboard widget, right alongside the built-in fields. Use a custom metric like CPA in a scorecard, or group a chart by a custom dimension like your channel grouping.

A custom field selected in a dashboard widget's field picker

They also work in dashboard filters, so you can filter a whole dashboard by a custom dimension.

Goals

Custom metrics are available when you set up a goal, so you can track targets against your own KPIs, not just the platform defaults. Set a target on your blended ROAS or a custom conversion metric and track pacing like any other goal.

Custom fields are computed live using the same query engine as the rest of the product, so they always reflect the latest data and stay consistent across every dashboard and goal that uses them.

Recipe Ideas

A few common ways teams use custom fields:

Metrics

CPA / CPL / CPC - cost efficiency from spend and conversions/leads/clicks
ROAS - revenue divided by spend
Conversion rate - conversions over clicks or sessions
Blended Spend - total spend across every ad platform in one metric

Dimensions

Channel Grouping - map many sources into Paid, Organic, Social, Email
Campaign Type - label campaigns Branded vs. Non-branded with conditional rules
Region / Strategy - extract a segment from your campaign naming convention with Split Text
Unified Campaign Name - one campaign-name column blended across platforms

The builder's Examples panel includes ready-made versions of many of these, open it to start from a recipe and adjust to your data.

Best Practices

Name for the audience. Use clear names like "CPA" or "Channel Grouping", they appear in every picker your team uses.
Add a description. A one-line description makes a field's intent obvious to teammates.
Preview before saving. Run the live preview against real accounts to confirm the values are what you expect.
Set a sensible fallback. Decide what should happen when a field can't be computed, rather than leaving unexpected zeros or blanks.
Reuse, don't duplicate. Because fields are workspace-level, build one canonical version instead of near-duplicates.
Order conditional rules carefully. Put specific rules before general ones so values land in the right bucket.

Next Steps

Creating a Custom Field - Build your first one
Dashboards - Put custom fields on charts and tables
Goals - Track targets on your custom metrics

Split Text

Split a dimension value by a delimiter and extract a specific fragment, ideal for pulling region, channel, or strategy out of a campaign naming convention.

Connectors

Connect your favorite tools to Google Sheets and Looker Studio with Two Minute Reports