These discounts will be reflected in the Sales module while purchasing a product, making an invoice etc.
Go to Global Settings–> Discounts–> Add New
Discounts List page:
Create a New Discount on this page where the fields to be filled are:
Name Name of the Discount.
Rate: Discount rate value.
Rate Type: Rate type like Percentage/Value.
Description: Brief description of Discount.
View button allows seeing all the Discount details.
By clicking on view, we can monitor the respective Discount detailed history on various modules like Invoices, Quotes, Recurring Invoices, and Purchase Orders.