In this blog we will see what Site Master Page and System Master Page are in SharePoint 2013 and Office 365. These two available features denote two different aspects of how you can choose different master pages over the site and system.
Site Master Page:
The site master page is used by all publishing pages on your SharePoint site which all viewers who will view the pages of your website will see. You can have a different master page for each Device Channel you have configured.
This will help you to have a control on the html files of the site’s master page and will directly reflect to the site pages.
System Master Page:
The system master page is used by administrative pages, lists, and document library views on this site. You can choose a different master page and add in your custom modified master page to be used by the lists, libraries, and the other views.
This will help you to have control over the html files of the admin’s view of master page and will directly reflect on them.
Keep reading and keep learning.