Are you really asking what does that mean?
Q What are the new earning fare types?
A. All fares flown on Emirates will be categorised into two types; 'Skywards Saver' fares and 'Skywards Flex' fares.
The above excludes any special fares, for instance those for contracted group travel and package holidays.
http://www.skywards.com/MS_Default.aspx?pgID=9
Ontoip of the numerous posts here about it!