Read： This permission level gives you read-only access to the website.

 Contribute：  In addition to all the permissions included in the Read permission level, the Contribute permission level allows you to create, edit, and delete items in existing lists and document libraries.

 Design：  In addition to all the permissions included in the Contribute permission level, the Design permission level allows you to create lists and document libraries, approve items, and edit pages in the website.

 Full Control：  This permission level gives you full control.

 Limited：   The Limited permission level allows access to a shared resource within a site, such as a specific list, document library, folder, list item, or document, without giving access to the entire site.

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　摘自《Microsoft - SharePoint 2013 Step by Step》