Overview of New Gmail

What's New in Gmail

Reference, create, or edit Calendar invites right from your inbox (and more!)
Snooze emails to move them out of your inbox until a specific time* (only available with Conversation view on)
Be reminded to respond to or follow up on messages with Nudges
Act on your messages (archive, delete, mark read/unread, view attachments) right from your inbox
Reply with suggested responses from Smart Reply (as of October, 2018, you can turn this Smart Reply off in settings)
Open and close sidebars for more room for your email