Once you have set up filters in your web store, you are now ready to begin assigning filters to products. To start, navigate to Catalog > Products.
On General tab, scroll down to locate Filters Settings section. It shows all the custom filters that you have set up. Clicking on any of them will show a complete list of keys to select a value.
Fill in values for relevant filter and click Save. It will ensure the product will show on the frontend when those filters are selected.
For bulk assignment of product filters, you can leverage export/import feature.
On Catalog > Products, click Tools and choose Product Filters under Export.
After making changes, import the file back in the system by selecting Product Filters under Import.
It is recommended to create filters by following the above mentioned steps so when you export the file, you are aware which column in the excel sheets holds what data.
For assigning filters to category pages, see our tutorial on How To Add Filters To Category Pages.