Advertisers have long been able to simulate the results of bid changes at the keyword and ad group level, and, now, they can do so at the campaign level, as well, Google has announced.

The change will allow advertisers to model changes even when there’s not enough data to do so at the keyword or ad group level. They can also see what would happen if they raised or lowered all of their bids within the campaign by a certain percentage — say, 5%. Advertisers can see what would result if you changed all campaign bids to the same fixed value.