A few years ago, email, SMS and forums were the most used communication channels , but this has changed rapidly.
Chat messengers have become extremely popular. And there is a reason: Messenger is a simple and quick solution that everyone understands and can use almost straight away.
Especially the younger generations clearly prefer sending a chat message over other channels.
At the same time, more and more older people are using messenger services.
A brief overview of worldwide user numbers (in million users) 2019: