This article will help you to distinguish the difference between your Inventory Manager and Selling Manager
The difference between the Inventory Manager and the Selling Manager is often brought into question by merchants who are new to using Sellbrite. While both "managers" look similar, they're used to accomplish different tasks.
NOTE: If you sell variation items, you'll notice that the total count of products found in the Inventory Manager is higher than that of the Selling Manager. This is because the Inventory Manager displays child SKUs independently from one another, whereas the Selling Manager groups them under their Parent SKU.
Think of the Inventory Manager as your online warehouse. As mentioned above, you will only find stand-alone and variation products here. Parent SKUs are not found in the Inventory Manager simply because they do not contain a quantity; They are not actual products.
Here is where you'll want to make changes to your product data, adjust inventory quantities, allocate warehouses, etc. Simply put, this where you'll manage your inventory.
The Selling Manager is used to organize your product data in a way that helps you sell. Here you will find filters and columns that let you see where you're offering your products for sale and where you've got some work to do. The "is not listed on" filter is a great way to isolate products you still need to list on a particular sales channel.