https://www.theverge.com/2018/9/12/17848500/google-inbox-shut-down-sunset-snooze-email-march-2019HighlightsGoogle is set to shut down its alternate mailing app
Inbox by Gmail was introduced as an innovative new email app
Some of the Inbox's popular features that have been added to Gmail are:
Snooze emails: Postpone emails to a future date or time that's more convenient for you.
Follow-ups (nudges): Gmail occasionally moves old emails to the top of your inbox with a suggestion to reply or follow up.
Smart Reply: Quickly reply to an email using suggested phrases that appear based on the email you received.
Google also offers alternatives to features of Inbox which have not been added to the Gmail yet. Like you can use Stars, custom labels, or use Gmail search if you used Pins in Inbox. Similarly there are also alternatives for Bundles and Reminders.