The document discusses various improvements and deprecated features in SharePoint 2016, and provides guidance on migrating from previous versions of SharePoint to SharePoint 2016. It outlines user, system, security, hybrid, scalability, and performance improvements in SharePoint 2016. It also lists deprecated features. The document then provides a checklist for migrating to SharePoint 2016, including installing and configuring SharePoint 2016, upgrading content databases, and verifying the upgrade status. It also discusses potential issues to expect and solutions when migrating from SharePoint 2013/2010 like InfoPath web service issues, changes to form based authentication, and missing picture library slideshow views.