Aim 1: Assess the feasibility, acceptability and initial efficacy of electronic Screening & Brief Intervention + Seek, Test, Treat and Retain (eSBI+ STTR) compared to STTR-only to reduce alcohol and other substance use among 450 YMSM and YTW in Chicago, ages 16-25, at 1, 3, 6, and 12 months post-intervention.