On March 26th 2019, Google released Dynamic Email for web, making emails more useful and interactive in Gmail. But soon on the 2nd of July 2019, Google would release this Dynamic Email for mobile support as well.
What is Dynamic Email?
Your emails can stay up to date so you’re always seeing the freshest information; like the latest comment threads and recommended jobs. With dynamic email, you can easily take action directly from within the message itself; like RSVP to an event, fill out a questionnaire, browse a catalog or respond to a comment.
Take commenting in Google Docs, for example. Instead of receiving individual email notifications when someone mentions you in a comment; now, you’ll see an up-to-date thread in Gmail where you can easily reply or resolve the comment; right from within the message.
Like the rest of Gmail, dynamic email is safeguarded by best-in-class privacy and security protections. To ensure added security, those who want to send dynamic email have to be reviewed by Gmail first before they can get started.

Businesses have also already started using dynamic email to make their emails more actionable and relevant; like Booking.com, Despegar, Doodle, Ecwid, Freshworks, Nexxt, OYO Rooms, Pinterest and redBus.
How can you use it or turn it off?
Once dynamic email in Gmail launches, users will begin seeing dynamic emails from senders who are sending dynamic emails; by default. Additionally, users can also turn dynamic mail off for their individual account within the Help Center. You’ll have to make sure that the “display external images” setting is enabled for dynamic email to work correctly.
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Where can you try it out?
Take commenting in Google Docs, for example. Instead of receiving individual email notifications when someone mentions you in a comment; now, you’ll see an up-to-date thread in Gmail where you can easily reply or resolve the comment, right from within the message.
With a simpler example like OYO Rooms; you can browse recommended hotels and rentals, and view details in fewer clicks right from the email.