Shortcuts is an app for speeding up actions on @Apple platforms. [1] Shortcuts is an iOS automation included in iOS 12. It is the new version of the Workflow app, which was bought by Apple. You can use the app to make small scripts which can be used by @Siri. [1] Some theorize that Siri might actually become good now because of this.
References
- /r/shortcuts, reddit.com/r/shortcuts