I'm using this to help make multiple shopping lists on iOS - todoist gets a copy of my amazon echo shopping list where I can (hopefully) add the label which will get parsed into it's own separate list in iOS. (still a work in progress!)
If
New task created with label
This Trigger fires every time you create a new task with a label you specify.
Fewer details
Explore more great ways to automate iOS Reminders and Todoist