This is all pretty simple. Below your account information, you’ll find two more blocks to manage your notifications: One for email and one for Facebook. Simply check or uncheck the boxes to be notified of each event. I’d suggest disabling the “Ad Approved” notification as it could really flood your inbox (you only need to be alerted when an ad gets rejected by Facebook). Set it up so most important events to be notified via email and either remove the others or enable them as Facebook notifications.