You can create a new deal by clicking on the “Add New Deal” button in the upper-right corner of the dashboard:

From here;

You can give your deal name for easy reference.

Note: This is just for internal use where in the Shopify admin

You can set the deal’s schedule’s start and duration of the deal

Note: The time follows the current timezone of the user

You can choose the type of deal. This means you can either select by Percentage off or a Fixed Amount. By default, the deal usually selects the Percentage off

If Percentage off was selected, a field was showing for choosing the value of the deal by percentage

If Fixed Amount was selected, a field was shown for choosing the value of the deal by a fixed amount.

Note: The amount will be set as a dollar by default

The set deals can be applied to collections or products by browsing on the list of collections or products. (You may round off the value of the deal by activating the Round Prices checkbox).

You may check the summary on the right part of the screen:

If done setting up the deal, you can finish creating the deal by clicking on the “Create Deal” button.