DA0-002 Visualization and Reporting Practice Question
A data analyst is working in Looker Studio and wants to add a metric that counts the number of unique customers per month. In the context of Looker Studio, which type of field is this metric?
⚠ Common exam trap
Many exam-takers confuse a dimension with a metric because they think 'customer' is a category (dimension), but the question specifically asks for a count of unique customers, which requires an aggregation, making it a metric.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Metric
In Looker Studio, a metric is a field that aggregates numeric data, such as counts, sums, or averages. Counting unique customers per month requires an aggregation (COUNT_DISTINCT) applied to a numeric or identifier field, which is the defining characteristic of a metric. Dimensions are used for grouping and categorizing data, not for performing calculations like counting unique values.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Dimension
Why it's wrong here
Dimensions are categorical attributes, not aggregations.
- ✗
Parameter
Why it's wrong here
Parameters are user inputs, not data fields.
- ✓
Metric
Why this is correct
Correct. COUNT_DISTINCT is a metric.
- ✗
Blend
Why it's wrong here
Blending is a method to combine data sources, not a field type.
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