1. In the dashboard, go under "Products" and click on "Attributes":
2. Click on the green button with the plus sign to add a new attribute:
To learn how to create filters, go to the support article "Add product filter":
To learn how to create product variations, go to the support article "Create product variations":
To learn how to add brands, go to the support article "Add brands":
To learn how to add additional information, go to the support article "Add product information":