function main() {

    var option = {
        impressions: '> 1',
        clicks: '> 1',
        conversions: '> 1',
        ctr: '> 0.1',
        costPerConversion: '> 0',
        conversionRate: '> 0.1',
      labelName: 'CONVERTER',
        dayspan: 90
    }
Logger.log("Options Defined");


    // Fetch ads accoring to criteria in var options from AD_PERFORMANCE_REPORT (link below)
    // https://developers.google.com/adwords/api/docs/appendix/reports/ad-performance-report

    var report = AdWordsApp.report(
              'SELECT Id, AdGroupId ' +
              ' FROM AD_PERFORMANCE_REPORT' +
              ' WHERE Impressions ' + option.impressions +
              ' AND Clicks ' + option.clicks +
              ' AND Conversions ' + option.conversions +
              ' AND Ctr ' + option.ctr +
              ' AND CostPerConversion ' + option.costPerConversion +
              ' AND ConversionRate ' + option.conversionRate +
              ' DURING ' + formatDateRange(option.dayspan)
            );

Logger.log("Queries Run On Defined Options");

    var rows = report.rows();

    // arrange results in array with id pairs
    var ids = [];
    while (rows.hasNext()) {
        var row = rows.next();
        ids.push(row['AdGroupId'],row['Id']);
    }
Logger.log("Arranged Results In Array");
    // select all ads which you have qualified
    var ads = AdWordsApp
                .ads()
                .withIds(ids)
                .get();

 Logger.log("Selecting Qualified Ads");

  // apply labels
    while (ads.hasNext()) {
        var ad = ads.next();
        ad.applyLabel(option.labelName)
    }
}
Logger.log("Applying Labels");
// Proper date range for reports. Accepts a number of days. Will count from today backwards
function formatDateRange(dayspan) {
      var msPerDay = 1000 * 60 * 60 * 24;
      var now = new Date();
      return Utilities.formatDate(new Date(now.getTime() - (dayspan * msPerDay)), AdWordsApp.currentAccount().getTimeZone(), "YYYYMMdd") + ',' + Utilities.formatDate(now, AdWordsApp.currentAccount().getTimeZone(), "YYYYMMdd");
}
Logger.log("Completed Labeling");