This chapter examines how corporate social media shapes product perception and marketing success, yet warns that, in today’s AI-driven world, data alone can mislead as easily as it enlightens. By likening viral content to ancient battlefield tactics, we show how tightly knit networks can magnify brilliance or destruction. We introduce six forces of social contagionSocial contagion (e.g., homophilyHomophily, conformity) and reveal the invisible architectures that steer collective behavior. But we also expose the limits of surface-level analytics: correlations may glow like shadows on a wall, obscuring deeper causal stories and pitfalls such as Simpson’s Paradox. Echoing Turing Award laureate Judea Pearl, we argue that real artificial intelligenceArtificial intelligence resides in the hidden “black box” generating the data, not in the numbers themselves. To harness social influenceSocial influence responsibly, marketers must open that box, uncover the mechanisms (“causal AI”) behind the metrics, and weave narrative, psychology, and causal reasoning together with machine learningMachine learning tools. Only then can they predict and direct digital contagion with clarity instead of fumbling in the dark.