With the Apple Smart Keyboard 10.5-inch iPad Air QWERTY, you can use physical keys to type text on your tablet. You connect the keyboard using a Smart Connector. Use the stand to put your iPad down and start typing a report or email. This cover is only suitable for an iPad Air 3 and an iPad Pro 10.5-inch from 2017. That means it's not suitable for an iPad Pro (2018).
This is an original Apple accessory.