Sales output conditions and data migration

Hi

I'm looking at migrating data from our existing system to new SAP system.

One of the questions I've been asked is based on sales output conditions. I'm not sure what these are... as they could be pricing conditons to appear on a slaes output  i.e. a sales order.... or a return order - am I correct? and typically what would we need to migrate in this area?

Thanks

Dave