E2EE
Messages that only the sender and receiver can see. The rest of the world gets a big fat nothing.
Your friend texts: 'Let’s eat pizza.' You reply: 'Yes.' No one else sees it.
Your crush texts: 'I like you.' You reply: 'Me too.' No one else sees it.
Your teacher texts: 'Don’t forget homework.' You reply: 'I won’t.' No one else sees it.