Send an email after multiple rows have been updated - email

Question

I've been using the below script which is working fine, however I'd like to cut down on the number of times it triggers.
function sendNotification(event) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
//var sheet = ss.getSheetByName("Allocation Requests");
var sheet = ss.getActiveSheet();
var row = sheet.getActiveRange().getRow();
var cellvalue = ss.getActiveCell().getValue().toString();
var emailAdd = "email#yourdomain.com";
if(event.range.getA1Notation().indexOf("G") > -1 && sheet.getRange("G" + row).getDisplayValue() && emailAdd.length > 1)
{
{var confirm = Browser.msgBox('Case Quantity', 'Is this a confirmed amount?', Browser.Buttons.YES_NO);
if(confirm!='yes'){return};
var rowVals = getActiveRowValues(sheet);
MailApp.sendEmail({
to: emailAdd,
subject: "Allocation Request - " + rowVals.quantity + " cases on " + rowVals.date,
htmlBody: "There has been a new allocation request from " + rowVals.name + " in the " + rowVals.team + " team.<br \> <br \> "
+ "<table border = \"1\" cellpadding=\"10\" cellspacing=\"0\"><tr><th>Issuing Depot</th><th>Delivery Date</th><th>Case Quantity</th></tr><tr><td>"+rowVals.depot+"</td><td>"+rowVals.date+"</td><td>"+rowVals.quantity+"</td></tr></table>"
});
}
}
/**
* get values of depot, date, quantity and name from their respective cells.
* #returns {Object.<string, string>}
*/
function getActiveRowValues(sheet){
var cellRow = sheet.getActiveRange().getRow();
// get depot value
var depotCell = sheet.getRange("E" + cellRow);
var depot = depotCell.getDisplayValue();
// get date value
var dateCell = sheet.getRange("F" + cellRow);
var date = dateCell.getDisplayValue();
// get quantity value
var quantCell = sheet.getRange("G" + cellRow);
var quant = quantCell.getDisplayValue();
// return an object with your values
var nameCell = sheet.getRange("B" + cellRow);
var name = nameCell.getDisplayValue();
var teamCell = sheet.getRange("C" + cellRow);
var team = teamCell.getDisplayValue();
return {
depot: depot,
date: date,
quantity: quant,
name: name,
team: team
} }
}
Users enter more than one row of data at a time, and I would like to receive a notification when that user has finished entering data, but still send the information in the email for all the rows they've entered. At present I get an email each time they complete a row.