The admin can easily import a bulk number of categories using sample files. The admin can download the sample files in formats - CSV/XLS/XML.

• Edit sample file as per your requirement 
• The admin can import the category with the image. 
• The admin can import the category without the image. 
• Add meta title, meta keyword, and meta description. 
• The admin can add product IDs in the file.

The admin can also add the child category with image and without the image. You need to import the category and image files and save it.

The admin can easily export the categories file and update it then import the updated file -

• The admin can export the category CSV file.
• Choose the store view and export the respective categories CSV file 
• Can update exported file as per the requirements 
• The admin can add more products to the exported CSV file 
• The admin need to import the updated file to make the changes

The admin will get the category id, parent category id, store name, category name, path of the category, category image name, is active, is anchor, include in menu, meta title, meta keywords, meta description, and product ids in the exported CSV file.

In the default Magento 2, you can create categories one by one.

If you want to add a bulk number of categories at a time, then there is no option to upload a bulk amount of categories.

With the help of the Category mass upload module, the admin can import a bulk quantity of categories using files (CSV/XLS/XML).