Google Keep's navigation menu shows your labels, so you can quickly find related notes.
You can now export notes to Google Docs: just click "copy to Google Doc" and Google will create a document from your note.
Reminders are more useful. Google Keep lets you create recurring reminders, just like in Google Calendar. You can create reminders that repeat daily, weekly, monthly, yearly or use the custom option for more complex reminders
The new features are available in Google Keep's web app, Chrome app and Android app (Google Keep 3.1).