Android 5.0 Lollipop is now rolling out to most Nexus devices.

The Android team just made the announcement on Twitter through the following tweet: "#AndroidLollipop rollout has started and will soon be available on most #Nexus devices. Dessert is served."

Nexus is a line of flagship Android-powered devices from Google. The product family consists of six smartphones and four tablets, with the most recent devices being the Nexus 6 smartphone and Nexus 9 tablet.

With the Lollipop upgrade, Nexus devices will get new Android features, such as: Material Design, lock screen notifications (without unlocking), a guest mode, new flashlight tool in Quick Settings, and a battery saver option.

Upgrades for Android devices are generally available over-the-air, which avoids the need for cables and a computer, and they tend to roll out gradually, depending on the manufacturer and mobile operator.

That said, Nexus devices are popular because they're the first Android devices to receive operating system updates. If an update is available for your phone or tablet, you'll receive a notification.

It's not yet clear which Nexus devices will get Android 5.0 Lollipop.

READ: Nexus 6: Google's pure Android phablet (hands-on)