In Post Ads for WordPress gives you the ability to insert advertising units inside the body of your posts or pages using a simple shortcode. You can use ads from popular ad networks like Google Adsense, or you can create your own ads from images.
If you ever need to change the ad that is being displayed, you can simply change the ad code once in the settings and it will update automatically everywhere that shortcode is being used.
This lets you easily manage ad units on your site without limiting yourself to posting ads in your blog’s sidebar, footer, or header of your site. Those areas aren’t where your reader’s eyes spend the most time, so don’t hide your money making ads in those dark corners!