A cursor for use in pagination. before is an object ID that defines your place in the list. For instance, if you make a list request and receive 50 objects, starting with obj_bar, your subsequent call can include before=obj_bar in order to fetch the previous page of the list.

A cursor for use in pagination. after is an object ID that defines your place in the list. For instance, if you make a list request and receive 50 objects, ending with obj_foo, your subsequent call can include after=obj_foo in order to fetch the next page of the list.