Some channels work by universe. Each universe has its own structure and corresponds with a clear typology of products.
According to the channels, a more or less large number of universes exist. To know which universe(s) to open for distributing your products, contact your channel account manager or visit the back-office channel (this can be fixed when signing your contract with the channel).
Once this has been fixed, create the corresponding channel catalogues in your Lengow account.