On 16 November 2020, Google announced new settings for smart features and personalization in Gmail. Under the new settings users were given control of their data in Gmail, Chat, and Meet, offering smart features like Smart Compose and Smart Reply. On 6 April 2021, Google rolled out Google Chat and Room (early access) feature to all Gmail users.
At the bottom of the contacts sidebar menu, click "Add a new contact." Enter a name for your new contact and enter the sender's email address in the "Email" text field. Add any additional information you would like. Click "Save" at the bottom of the sidebar menu to save your new contact. The contact will now appear under your contact list. AOL