WhatsApp offers its own free WhatsApp Desktop app available on the Mac App Store, where you'll find other third-party WhatsApp clients also available, such as FreeChat and ChatMate. You can use the WhatsApp website for a web-based experience, or if you don't like the sound of that, you can use a separate chat client instead. There are two principle ways that you can access your WhatsApp account from your Mac.
While the vast majority of these messages will have been exchanged over smartphones, it is possible to use WhatsApp on a Mac.
In 2018, the service said it was host to 64 billion encrypted messages on its most successful day. If you consider that it had 1.5 billion users in 2018 and 1 billion in 2016, then the number of active WhatsApp accounts has been increasing at half a billion every two years. At the last count in 2020, the Facebook-owned service had more than 2 billion WhatsApp users around the globe and rising. Despite strong competition from the likes of Telegram and Signal, WhatsApp remains the most popular messaging platform by a mile.