Portfolio bid strategies help you optimize performance across multiple campaigns. To date, portfolio strategies have been available for Target CPA, Target ROAS, Maximize clicks, and Target impression share. To make it even easier to use Smart Bidding with Search campaigns, Maximize conversions and Maximize conversion value are now both available to use with portfolios.
In addition, you can pair these new portfolios with shared budgets to get more conversions or conversion value. For campaigns that share a budget and use Maximize clicks, Maximize conversions, or Maximize conversion value, we recommend that you include them in the same portfolio.
Posted by Sagar Shah, Product Manager, Google Ads