Question related to Design Manager
Design Manager is a feature in SharePoint 2013 that makes it easier to create a fully customized, pixel-perfect design while using the web-design tools that you're already familiar with. Design Manager is a publishing feature that is available in publishing sites in both SharePoint Server 2013 and Office 365. You can also use Design Manager to brand the public-facing website in Office 365.
http://msdn.microsoft.com/en-us/library/office/jj822363(v=office.15).aspx
