In the new OS 2.0, metafield should be used if you want to show a filter.
Now I have used tags which is much more convenient in my opinion. How can you still show filters based on tags when on your webshop.
You can use tags to show filters on your webshop by creating tag-based collections and displaying these collections on your shop page as filters. The tags can then be used to categorize products and customers can use these filters to sort products based on their interests. Additionally, you can also use third-party apps or custom development to display tag filters on your webshop.