Using Google Groups for Business
Use groups as mailing lists or forums, to collaborate with co-workers, and more! 
Overview How To FAQ  

Google Groups used to have a classic look. Is that still available?

No, the classic version of Google Groups for Business is no longer available. It's been replaced for all customers by a new version of Groups that's cleaner, more focused, and full of great new features. Learn about Groups now!

The new Groups sure has a lot of features! Can you help me get started?

Yes. Check out these easy-to-follow guides for creating and using Google Groups for Business—as email lists, Q&A forums, web forums, and collaborative inboxes.

Note: You might need to work with a group owner or manager, or your Google Apps administrator, to enable all the new features. 

More resources

Groups Help Center
See more topics about using Google Groups.

Support your users
Get email templates and other materials to transition your users to the new Groups.

Apps administration
Get help managing Google Groups for your organization.