Tasker is a glorious application if you have the patience to learn how to use the app. What it does is allow users to create custom made commands and then use them in various places. There are many apps out there that have Tasker support and you can even use Tasker to create very complex commands for NFC tags. It’s difficult to truly explain what this app can do because it can do so many things.
Between the apps supported, plugins you an add, and the sheer volume of stuff that you can do, there aren’t many apps out there as useful as this one