Option 1: Campaign-specific bidding strategies. Step 1) Select a Campaign and click on Edit. Step 2) Select Change bid strategy. Step 3) Select the Bid Strategy of choice and click on Apply. Option 2: Create Portfolio Bidding Strategies. Step 1) Navigate to Tools and setting (Legacy interface) or Tools (New interface). Step 2) Navigate to Bid Strategies under Shared Library (Legacy interface) or Budgets and Bidding (New Interface). Step 3) Click on the + symbol and select the bid strategy of choice. Step 4) Configure and save your Bid Strategy. Step 5) Navigate to your campaigns. Select one or more campaigns and click Edit. Step 6) Select Change bid strategy. Step 7) Select the Bid Strategy of choice and then click to Use a Portfolio bid strategy. Step 8) Choose your portfolio bid strategy and click Apply.