Cisco ASA - Object-group service question

Hi,

When creating object-group service when applying the object-group to the acl where is it applied to?

Is it applied to the source or destination?

i.e:

access-list outside-in extended permit object-group Standard-80-443-PortGrp object obj_any object obj_web01

--in the above example. Would the service group that contains tcp 80/443 be applied to the source or destination?

Thanks in advance.