Some changes going on with Adwords it looks like.
Quote:
AdWords currently offers three ad rotation settings: optimize for clicks, optimize for conversions, and rotate evenly. Using the “rotate” setting for ad rotation is helpful for testing new creatives, but when run indefinitely can inhibit advertiser performance and deliver less relevant ads to our users.
Starting next week, the “rotate” setting for ad rotation will change. Instead of rotating creatives for an indefinite period of time, this setting will only rotate for a period of 30 days. After that, the setting will then optimize to show the ads expected to generate the most clicks. Every time a creative is enabled or edited, the ads in that ad group will rotate more evenly for a new period of 30 days.
This change will be rolling out next week. At that time, ad groups with....
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Continued at:
http://adwords.blogspot.com/2012/04/...-rotation.html
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