ShipStation is an order management suite that collects physical sales information from all of your merch stores and lets you manage them in one place. Bandcamp connects directly with ShipStation to help you fulfill your orders.
For Artist accounts: Go to Settings > ShipStation and select ‘Generate Credentials’
For Label accounts: Go to Settings > Shipstation to view your Shipstation syncing credentials
Once you have a set of credentials, they can be used to sync your Bandcamp merch orders with your ShipStation account.
Note: You will have to sign up for ShipStation if you do not already have an account. These credentials are for order syncing and not for logging in or creating a ShipStation account. A ShipStation.com account is different from the shipping label tools previously available under PayPal’s standard payments system.
More information on making the connection can be found here. ShipStation has some additional tips on using their Bandcamp integration.
Pro tip: marking orders as shipped within ShipStation skips Bandcamp's shipping notification emails. You'll want to make sure those are enabled on ShipStation's end to ensure your fans are receiving their order updates.