You are creating a SharePoint site that will be accessed from the following devices: Client computers Windows Phone devices Windows 8 RT devices You need to optimize the SharePoint experience for…

Device Channels in SharePoint publishing sites let you map specific user agent strings (such as those from Windows Phone or Windows RT browsers) to distinct master pages and CSS, delivering an optimized experience per device type. You define channels in Site Settings, assign user agent substrings, and then target master pages accordingly. This is the purpose-built feature for serving multiple device form factors from one site.

Image renditions control how images are cropped and resized for display, not how the overall page layout or design adapts per device.

Design Manager is the toolset used to create and import design assets; it does not itself route different experiences to different devices.

Custom list views change how list data is displayed in a single context but do not provide device-specific rendering of entire site pages.

Variations are used to manage multilingual or locale-specific content, not to target different device types.