在SAP系统中，用户组是仅仅是个分组吗？这个分组对人员的权限或者管理有什么作用？

应该是分组能实现批量操作和批量管理的效果吧。比如有一个用户分组叫仓管员，那在做权限的时候所有仓管员可以使用同一个通用角色。

请看F1.

用户主记录维护中的用户组User Group for Authorization Check

If you assign a user to a user group for the authorization check on the
Logon Data tab, you can distribute user maintenance tasks among several
user administrators. The system administrator can assign the respective user
administrator the right to create and change users in a group. Using the
authorization object User Master Maintenance:User Groups ( S_USER_GRP), you can
assign user groups to different administrators.
Users that are not assigned to any of the groups, can be maintained by all administrators.
General User Groups
You use the division of users into user groups on the Groups tab
primarily to group users for mass maintenance (transaction SU10). Furthermore,
the Global User Manager (transaction SUUM) uses the user groups.
In the user maintenance transaction (SU01), you can assign users to one or more groups on the Groups tab.
Maintaining User Groups
You create user groups using the function Environment -> User Groups
-> Maintain. If you are using Central User Administration, you must
create the user groups required in all systems.Use
You use the division of users into user groups on the Groups tab
primarily to group users for mass maintenance (transaction SU10). Furthermore,
the Global User Manager (transaction SUUM) uses the user groups.
In the user maintenance transaction (SU01), you can assign users to one or more groups on the Groups tab.
You create user groups using the function Environment -> User Groups
-> Maintain. If you are using Central User Administration, you must create the user groups required in all systems.