When setting a CPA, ERS, or ROAS target for a bid strategy, how much conversion history should be considered?
- 3-4 weeks
- 2 weeks
- 3 months
- 1 week
It’s best to start a Search Ads 360 bid strategy with a CPA, ERS, or ROAS target that matches historical (last 3- 4 weeks) performance because large differences in target ROI compared to historical performance may have an unexpected effect on spend and conversions or revenue.
Read more here: https://support.google.com/searchads/answer/7085426