For sites using Magento Klevu module versions 3.x or 2.x, please refer to this article. For version 4.x, kindly follow this link.
- Login into Magento Admin Panel
- Go to Stores → Attributes → Product (under Attribute section)
- Edit the attribute that you want to add as a facet in search results
- In Storefront Properties → Use In Search Results Layered Navigation → Select Yes
Note: If the website is using Flat Catalog for the products, please set the value of setting Used in Product Listing to Yes for the attributes assigned for Indexing to Klevu (see below screenshot for reference).
- Click on Save Attribute button
- Once you have changed the settings, please perform full sync by following the steps specified at the following link : Performing Full sync for the Store