This will only work in Google Messenger, which is a free app. It’s not the default texting app for some phones, like Samsungs. If you don’t have the app, you can download it for free from the Google Play Store. When you open it for the first time after using a different text messenger, you’ll be prompted to set it as your default messenger. Everyone in the chat must have an Android with RCS enabled.

Your choice of emoji reaction will appear in the bottom left corner of the message. Change the reaction by tapping and holding the message again and tapping a new emoji when the menu appears. You can remove your reaction by tapping and holding the message again, then tapping the highlighted emoji in the menu. [1] X Research source

For example, if an iPhone user responds to a text with balloons, the Android will get a text message that says, “Sent with Balloons. " The Google Messages app got an update that shows these responses as emojis, so an iPhone user responding to a text with a balloon will be sent as a text message of a balloon emoji. [2] X Research source