1. It's valued at cost, not retail. A shirt you bought for $8 and sell for $20 sits in Inventory Asset at $8 while it's on the shelf. The $20 only shows up as revenue when it sells; the account was never tracking what you'd charge for it.
2. It moves automatically when you sell something. The moment an inventory item appears on an invoice or sales receipt, QuickBooks shifts its cost out of Inventory Asset and into Cost of Goods Sold behind the scenes. You don't manually journal that transfer yourself.
3. It only applies to items set up as "Inventory," not every product you sell. A product type called Non-inventory exists specifically for things you sell or buy but don't need quantity-on-hand tracking for, like a service fee or a small supply item. Those never touch Inventory Asset at all.
4. You generally shouldn't post to it directly. Because its balance has to stay matched to actual item quantities and costs, adjustments should go through an Inventory Qty Adjustment (under + New, Other column) rather than a plain journal entry, which can leave the dollar value and the quantity out of sync.
5. It's not the same thing as a Fixed Asset. Fixed assets, equipment, vehicles, furniture, are things a business holds and uses over time and depreciates gradually. Inventory Asset holds goods a business intends to resell, and it's expensed through Cost of Goods Sold at the point of sale rather than depreciated over years.