Summary: Parallel branches let you do multiple things at once, you can add them by clicking Add Parallel branch under a workflow item.
Parallel branches allow you to run up to three branches on the same workflow simultaneously. This allows you to execute multiple actions at the same time. To add a parallel branch follow these steps:
1. Create your workflow and begin adding your workflow items. Once you have more than one workflow item, you'll be able to select Add Parallel Branch when you click the + button between two existing workflow items.
2. When you click Add Parallel Branch you'll be asked to select the workflow item that you want to start the parallel branch with.
3. The parallel branch will appear on the workflow and you will be able to add additional workflow items to it.