SharePoint Online: Updates to Document Library

With the roll out of Microsoft SharePoint 2016, changes are already happening to your existing Office 365 team sites including your document libraries. 

Microsoft have released an update around "What is a Document Library" that discusses the functionality and what can be expected.

https://support.office.com/en-gb/article/What-is-a-document-library-3b5976dd-65cf-4c9e-bf5a-713c10ca2872?ui=en-US&rs=en-GB&ad=GB