Allways is when you choose your runners to run in any order. For example, for a Quartet, if I choose numbers 1,2,3,4 it doesn't matter what position they finish in, as long as they all finish in the first four. You choose this instead of writing out 24 different quartet tickets which each represent a different combination.

You can find more information at this web site...

Quartet:

https://www.ozbet.com.au/html/HelpPgs/quartet.htm

Favourite Numbers:

https://www.ozbet.com.au/html/HelpPgs/favour.htm

I like Favourite Numbers, as you choose a minimum of 7 numbers and they are allocated to the nominated race favourite, and if that horse wins, then your favourite number wins. All favourites should (in theory) win.