Item Groups are used in some reports to aggregate your items into logical groups. For example, if you were tracking salable goods, cleaning supplies, and machinery & equipment, you might want to put these into separate groups. That way, you can quickly segment some reports so you can focus on different types of inventory. You can achieve just about the same thing with custom item fields, but some of the reports don't include custom item field data.
To Create a New Item Group:
1. Click the "Libraries" tab.
2. Click the "Item Group Library" link.
3. Click the "New Item Group" button.
4. Type the name of the new item group in the "Item Group" field.
5. Click the "Save" button.