Import additional select, multi-select attributes with Product CSV in Magento 2 using adding additional_attributes column.
Create a CSV file with the first column is the sku and the second column will be additional_attributes.
You must add a multi-select attribute value with the pipe separator.
Let’s take a Material Multi-select attribute from the Magento opensource Sample data, Continue reading “How to Importing additional multiselect Product attributes CSV Magento 2?”