When do I use this technique?
When you want to create a flat discount on all products on your store.
How do I configure it?
Create a new Promotion and make the following choices:
Promotion type: Automatic discount
Products: All Products
Discount code type: Fixed discount or Generated discount
What's the experience like for my prospects/customers?
Customers who browse to your home page or browse any product, collection or cart page on your store will be presented with this promotion.