sitecore\Sitecore Client Securing role grants access to features and applications used to assign access rights.
Gives the user access rights to security features in the Content Editor and other relevant applications.
This role is intended for users who need to maintain users and access rights.
You need to assign the
sitecore\Sitecore Client Account Managing role in order to provide access to applications used to maintain users, roles, and domains.
Gives the user access to maintain users, roles, and domains in the Access Manager, the Domain Manager, the Role Manager, and the User Manager.
sitecore\Sitecore Client Securing and
sitecore\Sitecore Client Account Managing are members of the
sitecore\Sitecore Local Administrators role.
These roles are described on the Security Roles Sitecore official documentation page: