Here's a good thread on content macthing.
[webmasterworld.com...]
You can turn off content at the campaign level by clicking on 'Edit Campaign Settings'.
If my CTR's are quite lower on the Content Targeting impressions, should I dissable it?
Do be aware that the CTR for Content Targeting impressions and clicks is not considered as part of the CTR that determines if keywords will remain running, or be disabled.
So low CTR for Content Targeted ads is not automatically a reason to 'disable' it.
AWA