Kontera Plugin for WordPress enables an instant addition of ContentLink contextual ads to your WordPress blog. With this plugin you can determine when ContentLink ads will begin appearing on new posts, you can choose to block ads for a particular number of days.
Here I will explain about the difference between contextual advertising, placement-targets advertising and Interest-based advertising.
Contextual advertising: A contextual advertising uses advanced algorithms to analyze content of the page and shows advertisements based on what the user is viewing. For example, if the user is viewing a site about technology which uses contextual advertising, user might see ads related to technology.