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

Ad Fill Rate mobile-advertising-glossary-metrics

The percentage of ad requests that are successfully filled with an ad impression: Fill Rate = (Filled Requests / Total Requests) * 100. Low fill rates may suggest weak demand or misconfiguration.

Metrics

Cost Per Install (CPI) mobile-advertising-glossary-metrics

CPI measures the cost to acquire a single app install: CPI = Total Spend / Number of Installs. It’s a standard KPI for user acquisition campaigns in the mobile app ecosystem.

Metrics

Impression mobile-advertising-glossary-metrics

An impression is counted each time an ad is served and appears on a user’s device screen, regardless of whether the user interacts with it. It is one of the most basic and foundational ad delivery metrics used to measure reach and exposure.

Metrics

Install mobile-advertising-glossary-metrics

In mobile advertising, an install refers specifically to when a user downloads and successfully installs an app on their device, often following an ad interaction.

Metrics

Session Duration mobile-advertising-glossary-metrics

Time spent within an in-app branded experience. Complements session length and reflects depth of engagement.

Metrics

App Launch Time mobile-advertising-glossary-metrics

Time from tapping the app icon until users see and interact with the app. Includes Time to Initial Display (TTID) and Time to Fully Drawn (TTFD). Typical targets: < 5 s cold start, < 1.5–2 s warm/hot start

Metrics

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