Apart from many new features like security, confidential mode which allow the user to add multi-factor authentication and / or set expiry dates on particular emails.
Spam / Phishing alerts are now highlighted in a much cleaner way, with highlighted red boxes that are not easy to overlook/ignore. Apart from this there is also a new “Tasks” integration with your mailbox to make your “to-do” lists easy to manage alongside your emails.
As the new GMAIL update has not been released for everyone so here is how you can manually update your GMAIL mailbox to new & sleek UI,
How To Enable New Gmail
Here is how you can enable new GMAIL, Go to your Gmail account on the web (as for mobile devices the new UI will be rolled with an update), click on the gear icon in the top right corner of the page. If the new Gmail update is available on your account, you will see an option “Try the new Gmail” on the top of the menu.
If you’re unable to see the option in the menu then you will have to wait a few days for the GMAIL team to roll out this update for all users.