engine - 9:11 am on Oct 24, 2012 (gmt 0)

What’s changing New ad rotation default when using Conversion Optimizer or Enhanced CPC. When you first activate Conversion Optimizer or Enhanced CPC in a campaign, your ad rotation setting will change to “Optimize for conversions” by default. We recommend this setting to get the most conversions, but you’re free to change to a different option. Eligible campaigns will switch to “Optimize for conversions.” As we announced last December, all campaigns using Conversion Optimizer or Enhanced CPC which are set to use “Optimize for clicks” will be switched to “Optimize for conversions.” You can opt out of this update via this form up until November 9th, but you may miss out on getting more conversions by doing so. “Rotate evenly” change for campaigns using Conversion Optimizer or Enhanced CPC. As we announced earlier this month, campaigns set to “Rotate evenly” automatically begin to optimize for clicks when ads in an ad group are unchanged for 90 days. Similarly, when using Conversion Optimizer or Enhanced CPC, campaigns set to “Rotate evenly” will automatically begin to optimize for conversions when ads in an ad group are unchanged after 90 days. Google Makes Changes To AdWords Enhanced CPC and Conversion Optimizer [adwords.blogspot.co.uk]