What is different - between Avast standard and professional?

What are the major differences between the Avast standard free program and the
professional edition?

I must be missing something in the technical jargon but it wasn’t that clear to me.

What are the advantages in paying for the professional version?

http://www.avast.com/eng/avast-compare-home-professional.html

Some things will change in the version 5 later this year.
Specially, seems that automated actions will be available also in the free version.