I have thinked about if this is possible.
My competitors running Google ads on their website. I wish that I run Google Adwords and get my advertising shown there (the competitors shows 728×90 google ads banners). Is this possible? – should I just run keywords on their site is in the meta keywords?
<meta name="description" content="Chat, sjov, ballade, tale sammen, ungdom, ungdomsproblemer, brevkasse, kærlighed, flirt, avatar">
Adwords has an option called “Managed Placements”. You can add your competitor’s URL there. Please note that he may block ads linking to your website in his Adsense account.