Hangouts Meet finally gains in-call messaging ability in latest update

According to Google, the chat functionality was the most requested feature in Meet since the service was launched earlier this year. With the latest version of Meet, users will be able to send text and links in real time. Moreover, the entire history of the chat will be now available for the duration of the meeting.
It's also worth mentioning that anyone using Meet can send and receive messages, even users who are not signed in with Google accounts.
source: Google
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