A product specification filter is a tool or feature often found on e-commerce websites to allow users to refine their search results based on specific specifications that match what they're looking for.
Learn more about How to Add Product Specification
Step 1: Access to Product specification filter page
Method 1: Seach "website setting" in search menu bar at the top of NMS
Method 2: Go to the NMS side menu > Website Setting > Product Specification Filter