If you are managing a single Adwords account you may not have heard of Adwords My Client Center (short: MCC) before. Basically, this is an environment to manage multiple Adwords account, potentially for multiple clients.
MCC Scripts are Adwords Scripts running at the MCC level, within your My Client Center.
These scripts are huge time savers for agencies and large advertisers managing multiple accounts.
The main advantage of MCC level scripts is you do not need to create and maintain separate scripts for each account. MCC scripts can run over multiple accounts at the same time.
See more info: https://developers.google.com/adwords/scripts/docs/features/mcc
Read more on how to convert a single account script into an MCC version of the script.
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