Announce Calls and Texts
If you go to Settings and select Phone, you will see an option for Announce Calls. If you select this and choose Headphones Only, then Siri will announce any recognized calls when you get them, via your AirPods.
This is a great feature to enable if you plan on using your AirPods while exercising or doing other activities where you can’t just glance at your phone.
Newer AirPods are also capable of announcing new text messages. Just find the button in Control Center while they’re connected to your iPhone.