Hyp's main use-case is sharing folders using something called a "Hyperdrive."
The simplest way to create a hyperdrive is by "syncing" one from a folder:
The sync command will output the URL of your new hyperdrive, and it will now contain your folder's files.
You can then sync the hyperdrive to another device using the same command:
hyper://1234…af is your hyperdrive's URL.
If you want to update your hyperdrive, resync it with the input folder by running the command again, this time with the URL as the target: