Products can be bulk-imported from a tab delimited text file, Excel can be used to create this.
Not all column names will have to be entered, just the ones that you want for the import. However you must include a code column.
Ensure the ones you do have are in the appropriate order.
The Import function is used for this.
A tab-delimited file needs to be created containing the codes of the products you wish to update, along with the specific information that is wanting to be changed.
As with importing products, the file requires the column names, but only the columns where information is to be updated along with the corresponding product codes.