Anyone can attach a file to a post to quickly share information without forcing recipients to slog through clogged inboxes. You can also upload files--including images and videos--to a file repository, where other Yammerers can download and update them. Groups have their own separate file repositories that augment the main one, and employees can receive automatic notifications whenever critical files are updated.

Collaborating

In addition to the previously mentioned file repositories, teams can also collaboratively create Pages (Pages are essentially documents) in a group setting. Admins have the ability to lock down Pages (and all other files) as official or read-only.

Open APIs

Need to integrate Yammer into Sharepoint? SAP? Salesforce.com? Something else that starts with an S? No problem, Yammer plays nice with them all.