When you want to add multiple tasks at once, you can do so by copying a spreadsheet (e.g. Excel) column or list of task names separated by new lines from a word processor.
Then, paste into the "Add a task" text field and press enter or hit the "Add" button.
If you want to include holding points between tasks, add a spreadsheet cell / line with triple minus "---" at the intended position.
Example
In order to create three tasks with a holding point before the final task, copy & paste the following text into the "Add a task" text field and hit the "Add" button:
Task 1
Task 2
---
Final Task