WhatsApp Messenger has been offering the facility to give emoji reactions to a message since before. However, it can be said to be quite difficult, and users have to tap for a while until the emoji window appears before selecting the emoji they want to press.
Recently, WhatsApp has made the process even easier, by only having to double-tap on a message. Through the latest update of WhatsApp Messenger, users only have to double-tap on a message, and the emoji window will appear before you choose.
Indirectly, this process is easier for users, compared to having to tap on a message for a while. We ourselves have tried it, and this new process is easier than before.
For those of you who use WhatsApp, you can update your application today, and use this new feature.