Gmail has rolled out its biggest revamp for years, introducing a new side panel to display emails, events, notes, and tasks in one place, allowing users to quickly manage their day-to-day tasks and calendar events alongside their emails. The update also includes features like snooze emails until later, self-destructing emails, and confidential email mode with expiration dates and authentication requirements. Additionally, Gmail now offers a preview of attachments without opening the email message, improved compose button design, and an integrated Google Tasks app for mobile devices. Users can access these new features by clicking on the "Try the new Gmail" option in their settings or by updating to the new version of Gmail.