The YITH WooCommerce AJAX Product Filter plugin allows you to create unlimited filters to help your customers quickly find the products they are looking for.
The plugin works with product categories, product tags, and product attributes. Before creating the filters, you need to set up the categories, the tags, and the attributes in WooCommerce and then associate your products to the proper category/tag/attribute.
For example, to create a “Filter by color” option you have to create the “Color” attribute in Product > Attributes, set the values (black, white, red… all the different colors), and then, associate each product to the right color.