The “Apply to each” action in Power Automate (formerly Microsoft Flow) is used when you want to perform the same operations on all items in an array or a collection. This action is similar to a for-each loop in programming, where you iterate over each item in a collection or array.

For example, let’s say you have an array of email addresses and you want to send an email to each address. You can use the “Apply to each” action to go through each email address in the array and send an email.

Here is how you can use the “Apply to each” action:

1. Add the “Apply to each” action: In your flow, add the “Apply to each” action where you want to process multiple items.

2. Specify the array or collection: In the “Select an output from previous steps” field, specify the array or collection that you want to iterate over. This could be an array variable, the result of a previous action, etc.

3. Add actions inside the loop: Inside the “Apply to each” action, add the actions that you want to perform on each item. These actions will be performed once for each item in the array or collection.