You are creating a SharePoint site that will be accessed remotely. You need to optimize the SharePoint experience for all mobile devices. What should you configure?

Custom list views customize how list data is presented but do not adapt the overall site layout or experience based on the type of device being used.

Image renditions allow images to be resized and cropped to different dimensions but do not control the overall site rendering or layout for mobile devices.

Variations are used to create multilingual or locale-specific copies of site content, not to optimize the site for specific device types.

Design Manager is the tool used to create and manage branding assets and configure device channels, but selecting it alone does not configure mobile optimization - you must specifically set up device channels within it.

Device channels is a SharePoint feature that detects the type of device making a request and serves a different master page and CSS, allowing fully customized mobile experiences. You configure device channels in Design Manager by specifying device inclusion rules based on user-agent strings and assigning different master pages to each channel. This is the purpose-built SharePoint mechanism for optimizing the site experience across different mobile device types.