Share files using AirDrop on iPhone
With AirDrop you can wirelessly share your photos, videos, websites, locations, and more with other nearby devices (iOS 7 or later). With iOS 8 or later, you can share with Mac computers with OS X 10.10 or later. AirDrop transfers information using Wi-Fi and Bluetooth—both must be turned on. To use AirDrop, you need to be signed in to iCloud using your Apple ID. Transfers are encrypted for security.
Note: You can also use AirDrop to securely share app and website passwords with another iOS device or a Mac. See Share website and app passwords on iPhone.

See the Apple Support article Use AirDrop on your iPhone, iPad, or iPod touch.
Share an item using AirDrop
Tap , then tap the name of a nearby AirDrop user.
Receive AirDrop items from others
Open Control Center, then tap
(if you don’t see
, touch and hold the top-left group of controls, or, on models with 3D Touch, press the top-left group of controls).
Tap Contacts Only or Everyone to choose who you want to receive items from.
You can accept or decline each request as it arrives.