Who has access to the site?

What are the members of the default SharePoint groups?

The web part shows all users in one view: SharePoint group members, M365 group members and members of nested Azure groups.

Which custom groups are used on the site?

Which users have direct access to the site without being member of any group?

Why is a person member of a particular group?

What is the group nesting hierarchy of SharePoint, M365 and other Azure groups?

What hidden groups do exist from shared documents and folders in the site?

What other hidden groups do exist without any assigned permission level?

How can I navigate to the classic SharePoint pages to manage groups and permissions?

How can I change the group membership of users?