# Parallel

The Parallel node allows you to add sub-flows to your workflow that run at the same time.

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Specifically, you can use parallel processing with subflows that contain non-interactive nodes. \
You can’t use parallel processing with **User Interaction** nodes like **Message**, **User Input**, **Callback**, **AskForApproval** or **V2**).

* Parallel sub-flow processing is ideal for customers who need to perform a set of actions at the same time (such as performing multiple changes in different external systems).
* Parallel sub-flow processing makes the workflow more “clean”, since a single node substitutes a sequence of subflow nodes.