Task Templates are incredibly beneficial to you because they allow you to add a group of tasks to a transaction. This saves you time since you're not manually adding each task to your transaction. You can create a number of task templates for all of the various scenarios you might run across in your transactions.
For example, you could have a task template for each of the different types of financing options that could happen for any transaction. This makes it so you are only getting the correct tasks which not only saves you time but also avoids any confusion on what tasks are actually needed.
Below are all of the articles that relate to task templates and task triggers.
The Basics