function main() {
  // 1. Data Source: Google Sheet
  var spreadsheetUrl = "https://docs.google.com/spreadsheets/d/..."; // Replace with your spreadsheet URL
  var dataSheet = SpreadsheetApp.openByUrl(spreadsheetUrl).getSheetByName("CampaignData");

  // 2. Campaign Template Settings
  var campaignNameTemplate = "Dynamic Campaign - {Product Category}";
  var budget = 100; // Daily budget
  // ... other desired campaign settings ...

  // 3. Iterate through Spreadsheet Data 
  var dataRange = dataSheet.getDataRange().getValues(); 
  dataRange.shift(); // Remove header row

  for (var i = 0; i < dataRange.length; i++) {
    var productCategory = dataRange[i][0]; 
    // ... extract other data from the row ...

    // 4. Create New Campaign (Simplified)
    var campaignBuilder = AdsApp.newCampaignBuilder();
    var campaign = campaignBuilder
      .withName(campaignNameTemplate.replace("{Product Category}", productCategory))
      .withBudget({ amount: budget, currencyCode: "USD" })
      .build()
      .getResult(); 

    // 5. (Optional) Create Ad Groups, Keywords, Ads based on Spreadsheet Data
  }
}