Billboards are everywhere in my city, and I've started wondering if outdoor advertising actually shapes what I buy or just clutters my commute. Last month I counted 14 ads on a 3-mile drive to work, yet I couldn't recall a single brand afterward. Maybe the real effect is subtler—repetition might nudge us even when we don't consciously notice it. Are we all just passively absorbing these messages, or do we tune them out completely?