AirDrop is an Apple feature that allows you to transfer files between iOS and macOS devices.
For AirDrop to work, Bluetooth and Wi-Fi have to be turned on.
For more information, take a look at Apple’s AirDrop support website.
You can share your document by tapping on the activity button.
In the popover, you can see the AirDrop section at the top.
After a few seconds, you should see the nearby devices you can share your document with.