The inventory on Browntape is a common inventory for all channels. 

However, it works only when the seller uses same SKU codes on all channels. Understand more about SKUs here.

If a sale were to happen on one online store, Browntape ensures that the stock on all other online stores is updated with the latest quantity. 

Anytime the inventory of a product changes, Browntape sends an inventory update to all channels within few minutes. This saves the seller from worrying about maintaining stock for each online store separately. This also means that all your stock is available on sale across channels, avoiding the possibility of missing an order, ever. A common inventory or multi-channel inventory also ensures that your store does not accept more orders than the available stock

Please refer to our video about inventory to understand the feature better.