Labels
Description: "Labels are like folders in Google Drive for your email. They are user created and applied tags which can be added to an email."
Templates
Description: "Tired of typing the same reply every time someone sends you email with a common question? Compose your reply once and save the email as a template. You can also include your signature. Later, you can open the template and send it again with just a few clicks."
Schedule Send
Description: "You can schedule your emails to send at a later time. Scheduled emails may be sent a few minutes after the scheduled time."
Layouts
Description: "Have a monthly or weekly newsletter to families? Use gmail layouts to create a customized format for your mail."