1. Replace the tracking link of the tracking number on the order status page: 

enable this feature, instead of going to the courier's website, your customers will check the order status right on your store. 

2. Add a tracking link to the order status page: 

enable this feature to add a tracking link to the order status page

3. Enable customer email on thank you page: 

enable this feature to allow customers to submit the email address they want to receive tracking notifications.