Custom Fields

Create your own metrics and dimensions, from formulas and conditional rules to blending fields across data sources and splitting text, and reuse them across dashboards and goals.

Custom Fields let you create metrics and dimensions that match your business logic, instead of being limited to the fields each platform provides. Define a calculation once, and reuse it everywhere.

A custom field can be a formula (like CPA or ROAS), a conditional rule (label a value based on what it contains), a blend of the same field across several data sources, or text split out of a naming convention. Custom fields are saved to your workspace and become available in the field pickers across your dashboards and goals.

What You Can Do

Create custom metrics (numeric) and custom dimensions (text/categorical)
Build calculations from fields, numbers, and math operators
Apply conditional rules to categorize, label, or transform values
Blend one field across multiple data sources into a single unified field
Split a dimension by a delimiter and extract just the part you need
Preview results against real account data before saving
Reuse every custom field across your dashboards and goals

A custom field is defined once and lives at the workspace level, so the same CPA or unified "Campaign Name" works consistently across every dashboard and goal.

Metrics vs. Dimensions

Custom fields come in two kinds, shown as tabs on the Custom Fields page:

Custom Metrics are numbers you measure and can do math on, for example cost per acquisition, return on ad spend, or a blended spend total.
Custom Dimensions are text or categories you group and filter by, for example a channel grouping, a cleaned-up campaign label, or a region extracted from a campaign name.

Build Methods

The methods available depend on the kind of field you're creating:

Custom metrics can use Formula or Blending.
Custom dimensions can use Formula, Blending, or Split Text.

Method	Metrics	Dimensions	Use it to
Formula	✅	✅	Metrics: do math on fields. Dimensions: combine fields and text into a label.
Blending	✅	✅	Map one field per data source into a single unified field
Split Text	—	✅	Split a value by a delimiter and extract a specific fragment

Formula works differently for each kind. For a metric, it's an arithmetic expression with math operators (+ − × ÷ % ^ and parentheses), for example Spend ÷ Conversions. For a dimension, there are no math operators, you combine fields and text into a label instead.

Conditional rules are not a separate method. They're an option you turn on inside a Formula field (metric or dimension) to return a value only when conditions match, for example "when the campaign name contains 'brand', then…". See Formulas & Conditions for details.

System Fields

Alongside the fields you create, the Custom Fields page also lists built-in System Fields, such as CTR, CPC, and ROAS derived from your connected platforms. You can open these to see how they're defined, but they're read-only, you can't edit or delete them.

Explore Custom Fields

Creating a Custom Field

The builder wizard, live preview, and fallbacks.

Formulas & Conditions

Math for metrics, text for dimensions, plus conditional rules.

Blending Across Sources

Unify one field across multiple data sources.

Split Text

Extract a fragment from a naming convention.

Using Custom Fields

Where custom fields appear, with recipes and best practices.

Next Steps

Create your first custom field - Walk through the builder
Use custom fields in dashboards - Add them to charts and tables
Track goals with custom metrics - Set targets on your own KPIs

Goals

Set performance targets, track live progress, and manage client budgets across all your campaigns in one place.

Creating a Custom Field

Walk through the Custom Fields builder: pick a build method, configure it, preview against real data, set a fallback, and save.