How to Edit Sale Messaging on Collection Pages & Product Page
In the theme customizer, here are the settings:
Click on the gear icon - you will see a section called On Sale

Checkboxes - You have the option to choose to show the messaging on the collection page & product page. Both of them do NOT need to be enabled.
Tag - the tag from the product that will allow this messaging to show
Tag title - is the text that you want to show based off the product tag entered
Title color - the color of the messaging that will show on the collection page & product page
This can be repeated up to 10 times*