Google is planning to introduce a new feature in its Messages apps that will allow you to react to messages using emoji. The company has rolled out the tests which were first spotted by Reddit users and the feature was reported by Android Police.
Just like iMessage, if you long-press the message, a series of emojis like thumbs up, thumbs down, anger, and crying with laughter appear on the screen. Right now, it only functions over RCS so you would not find it in SMS-only conversations.
Source: The Verge
Previously, Twitter and Messenger used the same approach as iMessage and introduced this feature in the chap apps. If you are unable to find it in your Google phone, then it’s probably because your region is not being tested, However, if the person you're talking to uses an emoji to react to the chat, you will receive a standalone message.
Google has rolled out the feature for a small number of users right now but if the beta version is successful, it might become a permanent part of the company’s service.