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.

It ends WhatsApp’s decade-plus run of offering an ad-free messaging and calling experience. Meta, which acquired WhatsApp in 2014, attempted to justify the decision by saying ads will be sequestered to its “Update” tab,