Contextual Advertising
Contextual advertising places in real time an ad on a page based on the specific content of that individual page. For example a publisher may have a sports channel and has traditionally sold this placement option with the same ad displayed on all pages in the sports channel. With contextual advertising an ad for tennis shoes would appear on pages about tennis events while an ad for golf clubs would appear on a page about golf events. With a news site this becomes even more powerful due the wide range of ever changing stories and topics covered by each page of the site.