This WSJ video investigation reveals how the video-centric social network is so good at figuring out interests you never expressly tell it.

This article was co-authored with Emma Myer, a student at Washington and Lee University who studies Cognitive/Behavioral Science and Strategic Communication. In today’s digital age, social media has ...

Ruqaiijah Yearby ([email protected]), Saint Louis University, St. Louis, Missouri. Brietta Clark, Loyola Marymount University, Los Angeles, California. José F. Figueroa, Harvard University, Boston, ...