If you’re reading this and you live in the UK there;s a very high chance you use WhatsApp. Not only that, it’s likely one of your most used daily apps, and could well have full replaced your iPhone or Android phone’s default text messaging app.

WhatsApp said Monday that users will start seeing ads in some parts of the app, as owner Meta Platforms moves to cultivate a new revenue stream by tapping the billions of people that use the messagin...