My Client Center (MCC) is a powerful tool for handling multiple AdWords accounts. MCC is ideal for large advertisers with more than one account and for third-party agencies, such as search engine marketers (SEMs), search engine optimizers (SEOs), and automated bid managers (ABMs). You can think of MCC as an "umbrella" account with multiple AdWords accounts (a.k.a. "managed accounts") linked to it.
MCC users can:
Owners of individual managed accounts can, as always, sign in to their AdWords accounts and maintain access to their login information.
It's easier than ever to sign up for a My Client Center account. Just visit www.google.com/adwords/MyClientCenter, click "Sign up now," and follow the step-by-step instructions.
Posted by Omar Abou Selman - Google AdWords MENA