Google launched Meet in April 2020 as the evolved successor to Hangouts Meet, making video calls accessible to anyone with a Google Account. It integrates directly into Gmail, with handy buttons in the left sidebar for starting or joining meetings right from your inbox.
If you rarely use Meet or prefer a streamlined Gmail view, hiding these buttons is straightforward. Note: Google Workspace admins may restrict this option for corporate accounts.
Follow these proven steps to hide Google Meet in the Gmail web app (desktop)—it works similarly on mobile too:

And you're done! Meet remains fully accessible at https://meet.google.com/.
Updated July 28, 2021, 11:30 a.m. ET: Originally published June 4, 2020; minor text tweaks and one screenshot refreshed for current interface.