In plain English
Country, device, page path, traffic source, campaign name. Dimensions are the words in a report; metrics are the numbers beside them.
Not every dimension pairs with every metric. Scope has to match, which is why some combinations return nothing or produce misleading totals.
What to know
Descriptive
The words, not the numbers.
Pairs with metrics
Which supply the values.
Has a scope
Event, session or user level.
Scope must match
Or the pairing is invalid.
Why it matters
Most confusing GA4 reports are scope mismatches: a user-scoped dimension against an event-scoped metric. Checking scope before building a report saves the confusion.
Common mistakes
×Pairing dimensions and metrics of different scopes.
×High-cardinality dimensions causing aggregation.
×Assuming any combination is valid.
×Reading totals from mismatched pairings.
FAQs
What is the difference between a dimension and a metric?
Dimensions describe; metrics count.
Why is my report empty or odd?
Usually a scope mismatch between the dimension and the metric.
WRITTEN BY TARIQ SALLAM
Marketing Consultant. Entrepreneur. Content Creator.
I'm a marketing consultant, entrepreneur and content creator. I help businesses grow through practical marketing, websites, SEO, content and AI.
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