If I told any average person that my Android phone’s notifications could now be sticky, shareable, and extra-smart about snoozing, they’d probably look at me like I was a lunatic. And, let’s be honest ...

There's just so many ...

Make sure you have it enabled.

After adding the “Mark as read” action, Google is modernizing Gmail for Android notifications with photo previews. Previously, Gmail notifications on Android showed the sender, subject line, and body.