The manufacturer section of your store allows you to set up manufacturers to use in labeling products by their manufacturer. Once a manufacturer is added, you will have the ability to choose this manufacturer on the product edit screen.
Manufacturers can be used for reporting and "Shop By Manufacturer" functionality in your store.
To add a manufacturer, enter the manufacturer's name in the box on the left side of the screen and click "Add Manufacturer". This manufacturer will now show up in the manufacturers section of the product edit screen
Click on the name of the manufacturer in the list to edit the name of the manufacturer