Navigate to this section by clicking the drop-down in the top right and selecting Manage Account > Personal Info.
Here, you can change things like your name, email address, and your password and customize your notifications settings.
For example, if you don't want to receive billing receipts, you can change that here. Or, if you want to be notified when there are long-running incidents, you can turn that on here too.
Note: long-running incident notifications and long-running degraded component notifications are sent after 3, 6, 12, and 24 hours.