Chitika ads aren’t contextual. Often, the same ads appear on pages with disparate content. Techtites highlights a couple of ways to make them more contextual. But you will have to get your hands dirty with some code hacking.

First, you can use the tech-buzz.net method of contextualising the ads based on the title of your post. Most any blog CMS can do this.

Second, you can use a Wordpress plug-in called Ultimate Tag Warrior to change the content of the ads based on your tags. While this is more accurate (because tags are easily changed and multiple tags can be used), this method requires Wordpress as well as a fair bit of hacking. But the instructions on the site make it easy to follow.