There are three primary goals for a property manager, whether that property be commercial or residential.  They are:

1.  Achieve the objectives of the property owner.

2.  Generate income for the owner.

3.  Preserve or increase the value of the property.

Though the job of a property manager breaks down into much smaller, definable tasks and functions, these are the overarching goals.  Everything done, from leasing, marketing, budgeting, maintenance, etc. must be aimed at those 3 goals, to not only make for a happy owner, but for a successful property as well.