the URL with _layouts/15/start.aspx because the new feature Minimal Download Strategy is activated on your site.  Currently in my Sharepoint Site, when I want to go to the main page sharepoint/SitePages/Home.aspx, it actually ends up going to sharepoint/_layouts/15/start.aspx#/SitePages/Home.aspx. this...

This feature introduced by SharePoint 2013 Minimal download strategy improved the SharePoint Site performance: 1.navigation, 2.fast rendering on client browser 3.It also reduces the SharePoint page load time, because it loads only a part of a page which is been modified rather than getting a duplicate data from server. This...