How do the SharePoint sub sites work?

The information in this article applies to:
SharePoint Sub Sites

You can create a sub site for various categories. For example:

• Departments - finance, marketing, IT
• Products - electrical, mechanical, hydraulics
• Projects - Trey Research, Department of Transportation, FDA
• Team - Retention team, BPR team
• Clients - new clients, old clients
• Suppliers - Supplier 1, Supplier 2, Supplier 3
• Customers - Customer A, Customer B, Customer C
• Real estate - property A, property B

The URLs for each will be, for example:
http://yoursitename.com/finance
http://yoursitename.com/marketing

You can keep track of permissions for each team separately so that access is restricted while maintaining global access to the parent site.