Logos is correct.
To be complete-
Chrome has 3 main flavors, Stable, Beta, and Dev
All are available for public download (release)
There is also an enterprise version not so easily accessed by the public.
The enterprise version is the Stable Channel but made for network installations and ends up placing Chrome in the Program Files directory. (It may be that this is what Avast is offering during install)
But technically the Beta Channel is beta
and as of today
Stable is v17
Beta is v18