Ad Fraud
Ad Injection — Definition & Explanation
A form of ad fraud where malware or browser extensions insert unauthorized ads into publisher pages, replacing legitimate ads or adding new ones. The publisher receives no revenue, and the injected ads may be low quality or malicious.
How Ad Injection Works
Browser extensions or ISP-level injection intercept page rendering and insert ad code alongside or replacing publisher ad tags. The revenue flows to the injector, not the publisher.
Why Ad Injection Matters for Publishers
Ad injection directly steals revenue from publishers and can damage user experience and site reputation. Working with an SSP that monitors for injection patterns protects publisher revenue.
Frequently Asked Questions
How can publishers detect ad injection?
Monitor for ad requests from unexpected domains, watch for user reports of unusual ads, and use ad quality monitoring tools to detect unexpected creatives.
Is ad injection common?
Ad injection was more prevalent before browser extension policies tightened. It still occurs through ISP-level injection in some regions.
What does Stellor Media do about ad injection?
Stellor monitors for injection patterns in ad serving and can help publishers investigate suspected injection incidents.
Related Terms
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