Is Outdoor Advertising still the best way to reach out to large audience?

Designing a city-wide OOH advertising campaign provides a large scope for marketers to showcase their brand to millions of people in a city. But in this day of technology and internet is this still the best way to reach out to people ad get leads in a large proportion for your business? What do you think? Please let us know. FOOTNOTE: http://bit.ly/2myJtr8