If you have an Android phone, you probably live through the notification panel. The bite-size alerts become a to-do list of sorts, summarizing which apps and messages require your attention. With Android O, Google is giving the experience a bit of a revamp. "Notification Dots" are small, circular blobs that sit on top of your app icons. They'll only appear when you have an unread notification -- long-tap and you'll get a quick preview in the form of speech-like bubbles. You can either tap them to jump right in or drag down from the top of the screen (as normal) to get a better look.