Contextual advertising is a digital marketing strategy where ads are displayed based on the content of a webpage or a user's search query. Rather than targeting users based on personal data or browsing history, contextual advertising analyzes keywords, topics, and themes within the page to serve relevant ads. This approach enhances user experience by ensuring ads are pertinent to the current context, increasing the likelihood of engagement while maintaining user privacy. In cybersecurity, contextual advertising is significant because it reduces reliance on tracking technologies that can expose user data, thus supporting privacy-friendly ad delivery.