Sample CSV files for Bulk Items Upload can be found in 

Admin > Items & Menu > Items > Bulk CSV Upload > Download Sample CSV

To download an example CSV file for bulk CSV upload for items, click here.

name - Name your item in this field.
restaurant_id 
item_category_id 
price - Set your item price in this field
image - In the Media Manager - Items Tab, upload the appropriate image and paste its URL.
is_recommended - If the item is advised for the store, set it to 1.
is_popular - If the item is popular in this store, set it to 1.
is_new - Set to 1 if the item is New to this Store Menu.
is_veg - Set to 1 if the item is Pure Veg.