Google is starting to phase out the old Gmail design

Google has announced plans to start moving users over to the new Gmail design and eventually remove the old one entirely, with the changes kicking off next month.
The announcements technically apply only to G Suite users — that is, people who have paid accounts through their company or organization — and Google declined to comment on whether the changes will be the same for regular Gmail users. But chances are they’ll be similar: the new design was announced first for G Suite