Attributes are meant to define different aspects of your products, for example, color, size, Waist, Weight etc. You can add and assign as many attributes as you like according to the nature of your business.
http://yourdomain.com/public/admin/products/attributes/display
Click on the “Add New” option to add the desired attributes you want to assign to certain products.
http://yourdomain.com/public/admin/products/attributes/add
Name the attribute as you want it to be displayed i.e Size, Color, Waist etc.