Yahoo! Search Marekting recently launched a new feature called Tune-up. It is an optimization tool that will give suggestions to advertisers to adjust their keyword Max CPC while allowing the advertisers to spend little effort and time.
The Tune-up feature works on the campaign level and works better when you have collected more campaign history.
You can choose to optimize one of the 4 metrics: Impressions, Clicks, Conversions and Revenue. The feature will only be able to tune up Conversions or Revenue when you have activated Analytics tracking and implemented Analytics tracking codes on your website.
It may not be able to tune up your content match bids at all.
You will be given a proposal within 48 hours after you asked for a Tune-up and you have the option not to accept the proposal. The proposal will contain a list of newly proposed keyword Max CPC (alongside their current Max CPC), the estimated number of impressions and clicks, and the estimated average CPC.
For those keywords that do not have history (or enough history), the Tune-up feature will usually ask you to raise their Max CPC. Sometimes, you can be given strange suggestions like pushing up Max CPC considerably on your high traffic but less-targeted keywords.
In short, Yahoo Panama Tune-up is a tool to improve the performance of your campaigns by allowing you to quickly make bulk Max CPC changes (without you paying much attention to details). However, the suggestions may not be 100% accuarate.