Hi Chandra,
Take a look at the documentation below and let us know if you have any questions. I would highly recommend walking through the documentation prior to posting here as you will likely find answers to your questions faster.
https://experienceleague.adobe.com/docs/campaign-classic/using/getting-started/permissions/access-ma...
That said, if you still have questions by all means, we will be happy to assist.
Regards,
Craig