When deployed, a user’s My Site document library is the default location for files that Microsoft Office 2013 client applications save. A discovery service identifies the URL of the user’s My Site and offers it as the default location in addition to other locations available for saving files. This promotes the concept of storing files in the document library of a user’s My Site where items can be managed, governed, shared, and moved. This helps reduce the amount of content that other systems, such as email or personal drives, store.
A new site template named Community Sites offers a forum experience to categorize and cultivate discussions with a broad group of people across organizations within a company. You can deploy a stand-alone community (shown). Or, you can activate community features on any site, which provides the core Community Site pages, moderation, membership, and reputation functionality within the existing site without creating a separate Community Site.