Cost Per Action (CPA) definition

Cost Per Action (CPA)

CPA is the amount spent to drive a specific user action (e.g., a subscription, sign-up, or in-app purchase). It’s commonly used in performance-based advertising models.

Metrics

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Ad Fraud and Scamming in Digital Advertising Glossary

Ads.txt / App-ads.txt Glossary

Mobile Advertising Glossary: Metrics and KPIs

oRTB Glossary

OTT / CTV Programmatic advertising glossary

Performance Marketing Glossary

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More terms of Metrics

Session Length mobile-advertising-glossary-metrics

This measures how much time a user spends in the app during a single session. Longer session lengths often indicate deeper engagement.

Metrics

Audio Duration mobile-advertising-glossary-metrics

Captures how long a user listens to an audio ad (e.g., complete plays, average duration, listen-through rate).

Metrics

Attention Metrics mobile-advertising-glossary-metrics

Metrics that assess how much attention users give to an ad, using data signals like eye tracking, time in-view, or interaction depth.

Metrics

Click mobile-advertising-glossary-metrics

A click occurs when a user taps or interacts with an ad, typically leading to a destination such as an app store page, website, or landing page. Clicks are crucial for measuring engagement.

Metrics

Audible On/Off mobile-advertising-glossary-metrics

Indicates whether video/audio ads were played with sound on. This can impact engagement and brand recall.

Metrics

App Crashes mobile-advertising-glossary-metrics

The rate at which an app unexpectedly closes during user sessions. Expressed as (Crashes ÷ Sessions) × 100%. High crash rates degrade UX and negatively impact app ratings.

Metrics

Win Rate mobile-advertising-glossary-metrics

The percentage of submitted bids that result in an ad impression: Win Rate = (Won Bids / Submitted Bids) * 100. Low win rates might suggest competitive markets or underbidding.

Metrics

Ad Frequency mobile-advertising-glossary-metrics

The average number of times an ad is served to the same user. Helps assess saturation and avoid ad fatigue.

Metrics

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