If you want to keep a paperless office, you need to be able to scan documents. Previously, you needed a scanner to do this. But today you can use your iPhone to scan documents quickly and easily. With Continuity Camera you can scan directly into your Mac using your iPhone. You need to make sure you have both Wi-Fi and Bluetooth enabled with both devices and that they are using the same Apple ID and latest macOS and iOS.
The handoff feature of macOS and iOS allows you to use a Universal Clipboard to copy text, images, files or just about anything between your devices. You can use this to copy and paste text and images between documents while working with two or more devices. You can also transfer entire files this way, which is actually easier than using AirDrop in many situations.
While working on your Mac, you can use your iPhone or iPad to take photos, scan documents and draw sketches. The result will end up as files on your Mac, being saved directly from the iOS device to your Mac. You can also insert these images directly into documents in some apps. You can also use this to create signatures in Preview.
A powerful new feature of macOS Mojave and iOS 12 is the ability to use your iPhone or iPad as a camera and capture images directly to your Mac. You can grab images right in apps like Preview, Pages, Mail and others. You can also scan multipage documents. Images skip being stored on your iPhone and go directly into the app on your Mac. However, using this feature requires the latest operating systems, recent hardware, and the right settings including two-factor authentication for your Apple ID.