Placing ads based on the content of the webpage rather than user data.
Contextual targeting matches ads to the content of a webpage or app, rather than targeting based on user behavior or demographics. If someone reads an article about running shoes, they see ads for running shoes — regardless of their browsing history.
With the deprecation of third-party cookies and stricter privacy regulations, contextual targeting has resurged as a privacy-friendly alternative to behavioral targeting. It requires zero personal data.