Google (NASDAQ:GOOG) launched a new feature for Gmail Tuesday that allows users to prioritize email via an automated filtering system that keeps wanted messages noticeably higher while pushing all others further down the list.

The Priority Inbox utilizes a variety of signals, including, past read and replied emails, frequent mailers and deleted emails, and commonly used words, to determine which are more important.

The feature, which uses the same technology as Gmail’s spam filter, automatically categorizes them into three sections; important and unread, starred, and everything else.

Starred messages are chosen by the user to remind them visually to refer back to those emails at a later time.

If Priority Inbox makes a mistake, the user can lend a hand by marking a message as less or more important, which will be stored for future instances.

Google said that over time the Priority Inbox will learn what’s important, incorporating user feedback.

The feature is not fully available on mobile devices, though it does work if Gmail is accessed via the web browser on Android and Apple (NASDAQ:AAPL) devices, and works on most devices if accessed via a built-in email program, such as Google Sync.