The “Apply to each” action in Power Automate (formerly Microsoft Flow) is used when you want to perform the same operation on multiple items in an array. It’s a loop structure that goes through each item one by one and applies the specified actions.

For example, if you’re working with a list of emails and you want to send a specific response to each one, you would use the “Apply to each” action. You would first specify the array (in this case, the list of emails), and then define what action to take (for instance, sending a response).

It’s important to note that the operations within the “Apply to each” loop are performed in sequence, not in parallel. This means that the action will be applied to the first item, then the second, then the third, and so on, until all items in the array have been processed.

In the settings of the “Apply to each” action, you can also control whether the loop should continue or stop if an error occurs with one of the items. This allows for greater flexibility and error handling in your flows.