What are the things that sets digital marketing apart from physical marketing?

[Kross]

Digital marketing seems to be a specialized course on it's own. But some people have been doing physical marketing for years and are good in it.

What are the core things that makes digital marketing completely different from physical marketing?

 

[eLdavis]

Am pretty sure the major difference should be the use of social media and other things like SEO and the likes.

 

[Min George]

The main difference between marketing offline and online is the size of the potential audience. It is bigger online.