A catalog price rule is a promotion which will display the special prices on the storefront to those who are logged in as a certain customer group.
The first thing to do in any case is to go to Customers > Customer Groups > Add Group if you have not already.
Step 1 - Rule Information
Navigate to Promotions > Catalog Price Rules > Add New Rule
Fill out the required rule information and pay special attention to the Customer Groups portion of this view. This will specify that the rule will only apply to the customers belonging to a particular group or groups.
Step 2 - Setting Conditions
On the Conditions Tab to the left, this is where you will configure which category(ies) this rule will apply to. See below:
Notice the verbiage of the conditions. Keep in mind that bolded words are configurable including the ellipses. To get started writing conditions, click the green plus button and select Category in the drop-down menu.
Important- Pay attention to the verbiage. If there are multiple categories this promotion will apply to, you will need to change the word is to is one of by clicking the bolded is and selecting the appropriate action
To select the categories, click the '...' and open the chooser- the icon to the left of the green plus icon - and select all of the categories (including the parent category if applicable) that you want to include as a part of the promotion.
Step 3 - Setting Discount Actions
On the Actions Tab to the left, this is where you will figure the amount discounted and how the discount is applied (ex: by a percentage of the original price, by a fixed amount, etc)
5) Click Save and Apply.
There is a lot that you can do in terms of promotions that appear on the front-end of your website and the products that populate your store. If you need help applying these concepts to a different type of promotional rule, please comment on this article and we will assist.