Enhanced Scripts can be run at child account and MCC level. You can set different settings for each child account and then run them all on a single script.
To create a script that can be run at the MCC level, you will need to create a setting for each child account you want the script to run in. The advantage is that you can have a separate setting for each child account while running a single script at the MCC level.
You don't need to recreate the setting from scratch in each child account. It is possible to copy settings from one child account to another using the 'Copy from another account option'.
Once you create the configuration for the child accounts, you will need to download the MCC version of the script one time (from any of the child accounts where you've created the setting).
Once you log into your AdWords account, go to the MCC where you want to run the script. Click the Scripts option under Bulk Operations in the sidebar, and upload the script directly to your Adwords MCC account.
In your MCC account, you can also schedule the script to run as often as you want (once a week, twice a month, etc.).
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