Trigger gets many records — handle one at a time
Sometime some trigger sends data in bulk but we need to run them one by one. So, here is the option which runs data one by one for all entries.
How to enable it?

Example
Just like when you enable “Run One by One”, you will see the data being processed sequentially.
In above image, there are multiple cards inside a card array, and each card runs individually — one after another.