function main() {
  // Target Locations (Adjust this list!)
  var targetLocations = [
    "California", 
    "New York", 
    "Texas"
  ];

  // Bid Adjustments (Positive = Increase, Negative = Decrease)
  var locationBidModifiers = {
    "California": 0.20,  // Increase bids by 20% in California
    "New York": 0.10,    // Increase bids by 10% in New York
    "Texas": -0.15       // Decrease bids by 15% in Texas
  };

  // Campaign Selection 
  var campaignName = "Campaign Name"; 

  // Get all the location criteria within the specified campaign
  var locationIterator = AdsApp.campaigns()
      .withCondition("Name = '" + campaignName + "'")
      .get()
      .targeting().locations();

 while (locationIterator.hasNext()) {
    var location = locationIterator.next();
    var locationName = location.getName(); 

    // Check if the location is in our target list
    if (targetLocations.indexOf(locationName) !== -1) {
      var bidModifier = locationBidModifiers[locationName];

      // Set the bid modifier only if it exists
      if (bidModifier) {
        location.setBidModifier(1 + bidModifier); 
      }
    }
  }
}