You will need to use an FTP program such as FileZilla to upload the world to your server.
Make sure your server is off before beginning this process.
Access your server files using FileZilla - Getting started with FileZilla
Upload the world folder to the server
If you are using Java Edition, upload it to the root directory of the server.
If you are using Pocket Edition, upload it to the worlds folder.
Set the name in the world box on the main page of the panel to the name of your world folder
Save the changes
Start your server
Updated on: 11 / 05 / 2020