Sort filter items by

This option is available for the taxonomy-based filters and controls the order in which individual terms appear within the filter. You are given the choice of sorting by Name, Order of creation, Numerically or by the Admin sort order.

Admin sort order is the custom items order that you can set for the WooCommerce product categories and attributes on their respective admin settings pages. The ability to assign custom display order for custom taxonomies depends on the custom taxonomy manager that you use.