getTitle

function getTitle(tURL) {
  var objSpreadsheet = SpreadsheetApp.getActiveSpreadsheet();
  var objSheet = objSpreadsheet.getActiveSheet();
  var objCell = objSheet.getActiveCell();
  var response = UrlFetchApp.fetch(tURL);

  var myRegexp = /<title>([\s\S]*?)<\/title>/i;
  var match = myRegexp.exec(response.getContentText());
  var title = match[1];

  title = title.replace(/(^\s+)|(\s+$)/g, "");  
  //objCell.setValue(title)
  if(title==null){
    return "NULL";
  }else{
    return title;    
  }
}

getDescription

function getDescription(tURL) {
  var objSpreadsheet = SpreadsheetApp.getActiveSpreadsheet();
  var objSheet = objSpreadsheet.getActiveSheet();
  var objCell = objSheet.getActiveCell();
  var response = UrlFetchApp.fetch(tURL);

  var myRegexp = /<meta name=\"description\" .*content=\"([\s\S]*?)(\".*\/|\".*)>/i;
  var match = myRegexp.exec(response.getContentText());
  var title = match[1];

  title = title.replace(/(^\s+)|(\s+$)/g, "");  
//  objCell.setValue(title)
  if(title==null){
    return "NULL";
  }else{
    return title;    
  }
}