At the end of every transaction, the menu screen allows customers to enter their email address to receive an itemized receipt. This data is then visible to you to export and later use for any marketing materials to help engage with your customers.
Example of Menu Screen experience to the end-consumer:
In the Transactions tab, you will be able to easily export select customers from certain transaction dates or purchased from a certain store.
Navigate to the Transactions tab
Select Export Icon in the top right corner next to the Search box
Select all the stores you wish to pull email address from
Select Data Range by using the calendar picker