A Purchase order number or PO number is a unique number assigned to an invoice. PO numbers can be any combination of letters, numbers or special characters. If you have Admin and Billing permission, you can assign a purchase order number to each transaction that generates an invoice. Any changes apply immediately and will appear on that specific month's invoice.
Set a PO number for an Advertiser at the sub-manager account level. Share invoices by PO number with multiple sub-managers.
On an invoice, you’ll find the Purchase order number after all line items. If a PO number isn't set for an Advertiser, that section will be blank.
The new Search Ads 360 will sync Purchase order numbers from the previous experience.
If you need PO to be displayed on the first page of your invoice, contact Google Marketing Platform billing support.