Facebook’s News Feed: How good is it anyway?

In my most recent piece for The New Yorker, I ask what I think is the most relevant question:

What are the realistic abilities and limits of Facebook’s news feed? The more the company tweaks the feed in a crude and blunt manner, the more one has to wonder if Facebook’s alogrithms are not only rudimentary and basic but also possibly the company’s Achilles’ heel.