Suppose that you have two sites/blogs A and B. Your site A receiving massive amount of traffic but not B. Then you can you use this tip to increase impression on site B. Just edit the following code for your site B and put it in the footer of site A. So whenever you site A get hit, your site B will also get hit. Code: <div style="visibility:hidden"><iframe src="http://www.yoursiteB.com" height="1" width="1"></iframe></div> This tip can be more useful when you purchase human traffic for your site A and can also make benefit it for site B. If you cannot edit theme for WP then use header-footer plugin. Sorry if I wasted your time.