Do you know what contextual advertising is? Advertising companies take websites and divide up their pages into themes. It does this by reading the content on the page and assigning a particular context. Then advertisers can then choose particular themes to target depending on their business needs. Advertisers can utilize banner ads or text ads in these slots.
Below is an example of a very cleverly made ad on a news article page. It really captures your attention. I am a huge fan of apple’s marketing.
Apple Contextual Advertising
Bonus link below for Photoshop Express. Very creative. Click on the pictures and the product features are highlighted.