Once you have set up your Goals, selected all the ones that you want to measure and activated as a Goal and in the action list, hit 'Next' to set up targets.
Once opened, scroll to the required Goal and select ‘edit’ to apply this goal to a user:
Here you can now select the user you wish to apply the target against and then apply the relevant target figures:
You can measure Goals by week, month, quarter, or year.
Once you hit save, you can choose to start tracking these immediately or from the start of the next relevant time period.