Glossary/Audience data/Contextual advertising
What is contextual advertising and contextual targeting?
How contextual targeting works, how modern semantic analysis improves it, and why it works well for publishers.
Written by Samhub with the help of AI·Updated 13 Oct 2026·3 min readContextual advertising shows ads based on the content of the page being read, such as a car review or a recipe, rather than on data about the reader.
How contextual targeting works
Analyze the page
Text, topics and sentiment are read automatically.
Classify it
The page is tagged with categories such as electric cars.
Match ads
Buyers target the categories, and ads appear on matching pages.
Keyword vs semantic targeting
| Keyword | Semantic | |
|---|---|---|
| Reads | Single words | Meaning and context |
| Risk | Misreads, such as “shooting” in a sports story | Fewer mistakes |
| Use | Simple setups | Brand safety and precise topics |
16 pages for publishers, with a checklist for data, programmatic and direct sales.
Why it is growing again
Context needs no personal data and works for every reader, logged in or not. Combined with first-party audiences, it lets publishers offer targeting on all their traffic.
Addressability at Stampen Media after moving its reader data into one layer with Samhub.
Frequently asked questions
Targeting by page content does not need personal data, though other parts of the ad chain may still use cookies.
It is often close, and it reaches people in the moment they read about a topic.
Contextual targeting that reads meaning, not just keywords.
Yes. The same analysis can keep ads away from unsuitable content.
Related terms
Targeting ads based on what readers have done before.
Keeping ads away from harmful content.
Collects and segments audience data for advertising.
Adding detail to the data you already have.
Ads based on inferred interests.
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