AdsExam

Understand every ad-tech metric, one clear idea at a time.

Learn the KPIs behind bids, fill, and ROAS — for publishers and growth teams.

Get startedSee how two relate

CTR

2.4%

clicks / impressions

eCPM

$4.20

revenue / impressions × 1000

CPC

$0.42

spend / clicks

RPM

$12.8

revenue / 1000 pageviews

ROAS

3.1x

revenue / ad spend

Fill

87%

filled / requests

AdsExam

Learning loop

Browse encyclopedia →

Pick two metrics. See how they connect.

Overlap, trade-offs, and when one moves with the other: then open the full relationship guide.

How it works1 Pick · 2 Pair · 3 Guide or tip

Any two metrics are allowed. Strong pairs unlock a written guide; weak pairs get a short decision tip instead.

1Metric A

Impression

Delivery

An impression is counted each time an ad is fetched and displayed to a user, per the platform’s counting rule.

vs

Impression vs Reach

2Metric B

Reach

Delivery

Reach is the estimated number of unique people who saw your ad at least once during a reporting period.

3Open the relationship guide

Free relationship guidance — no sign-up.

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