Elaine wants to make $4 of revenue for every dollar she spends in a Display campaign. How should she set up the campaign?

In Target ROAS, the percentage represents conversion value divided by ad cost. A goal of 400% corresponds to a 4-to-1 revenue return, so it matches the required efficiency target. Google Ads uses Smart Bidding to optimize toward conversion value while trying to maintain that return level. This makes it the correct setup when the objective is revenue efficiency rather than a fixed cost per acquisition