In Settings → Notifications, you can:

Turn email notifications on or off with a single toggle.
Set an alternate notification email address, separate from your login email — useful if you'd rather alerts go to a shared inbox.

In-app notifications (the bell icon) always show regardless of this setting — the toggle only controls whether you also get emailed. You'll be notified about completed audits, your site going down or recovering, and running low on quota or wallet credits.

Mark everything read at once from the notifications page, or click an individual notification to jump straight to what it's about.