CReATION: INTERNET Q & A, Brought to you by CNN.COM

<p>Q: Please explain what ROI and ROS are respectively. </p><p><BR><BR> </p><p>A: ROI (return on investment) is "the bottom line" on how successful an </p><p>ad or campaign was in terms of what the returns (generally sales </p><p>revenue) were for the money expended (invested). </p><p><BR><BR> </p><p>Run-of-site: A run-of-site ad is one that is placed to rotate on all </p><p>non-featured ad spaces on a site. </p><p><BR><BR> </p><p>CPM rates for run-of-site ads are usually less than for rates for </p><p>specially-placed ads or sponsorships. </p><p><BR><BR> </p><p>(Source: http://www.whatis.com/adterms.htm) </p><p><BR><BR> </p><p>If you have any questions for this column, write to </p><p>cnni.asia@turner.com. </p><p><BR><BR> </p>