Having the AirDrop shortcut in your Dock will allow you to access it from any screen, regardless of the application you're using, and without having to open a Finder window first. Regular AirDrop users in particular should appreciate the convenience it provides.
How to Add AirDrop to Your Mac's Dock
- Open a Finder window or click the Desktop.
- In the Finder menu bar, select Go -> Go to Folder.
- Paste the following directory path into the dialog and press Enter: /System/Library/CoreServices/Finder.app/Contents/Applications/
- The Contents/Applications folder within the Finder.app package will appear. Using your mouse, drag the AirDrop app to the desired location in your Dock.
- Close the Finder window.