How to get Notifications for Important Emails on iPhone (iOS8)

The Mail app gained a new feature in iOS 8, allowing you to enable notifications for individual email threads. If you’re participating in an important discussion, you might want to set up notifications for that thread only. Or, you could have some sort of automated notification system that notifies you if your servers are on fire, and ensure it sends messages that end up in a specific thread. Activate notifications for that email thread and you’ll be in business.