The bidding strategy that should be used to increase revenue from ad spend is Target ROAS.
Target ROAS (Return On Ad Spend) is an AdWords smart bidding strategy that allows bidding to take place on a target return on ad spend basis. This gets you more revenue or conversion value at the target RAOS set by you. To use this bidding strategy, a campaign must have a minimum of 15 conversions in the past one month.
