When you enable the Conversions for Optimization, you will be given the option to set bid strategies for specific conversion actions. An example given by Search Engine Land’s Ginny Marvin, if you are tracking catalog downloads and course sign-ups, it’s now possible to set up bid strategies to optimize only for the high value course sign-up conversion, and not the downloads.
This change will be more widely applicable, and will allow users to decide whether or not bid strategies are in use.
When the “Optimization” conversion setting is enabled in a campaign, you will be able to isolate the conversion data for the conversion type that is most important to you in the reporting by showing performance for the optimized conversion type, even if you’re bidding manually.