Whenever you want to update or edit existing Facebook creative, you can use the Lightning AI app to save time and ensure data accuracy.
For example, if you want to change a URL to a new landing page or edit a piece of creative you're currently running, you can use the Lightning AI app for a faster, better experience than Power Editor.
For the first step in editing existing creative, go to the side nav and select Creative Settings.
Select the Creative you'd like to modify from the dropdown menu and select "Next"
Here you are able to modify your Creative. Select "Save" after you've made your changes. Be sure to let the page load before closing - a spinning wheel means it's working!
You've successfully edited your Creative! Any changes you make will be reflected on Facebook automatically.