Importing products
If you have a large number of products or a catalog that changes on a semi-regular basis, you might want to use the data import function. This function lets you import .csv files with your products and will create new products or update existing ones.
Product import is supported with 4 import functions:
Create initial product record
Add product prices
Add country of origin
Delete product record
For each import option, an example file is available.
Import per channel (portal)
Products are imported under a channel (portal). When you use multiple channels (portal) you need to specify for which portal the upload will be done.
More information about products and importing them can be found here.