Meta Platforms' WhatsApp announcement adds another catalyst for growth and appreciation. Click here to find out why I rate META stock is a Strong Buy.

I talked with a professor of advertising to make sense of what this means for all of us who use those social media platforms.

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