Pages tagged campaignmonitor:

Promoting your product or service with banner ads - is it worth it? - Blog - Campaign Monitor
http://www.campaignmonitor.com/blog/post/2779/promoting-with-banners-ads/

To me, the most important element was actually testing everything as we went. By putting in a little extra work, we could quickly gauge which ad creative, landing page and advertiser was giving us the best results and react accordingly.