Microsoft today announced that SharePoint modern document libraries are now rolling out to all Office 365 commercial customers worldwide. Modern document libraries have an updated user interface that offers an experience similar to OneDrive, so it’s more intuitive to create a new folder and upload files in the browser.
A document library provides a secure place to store files where you and your co-workers can find them easily, work on them together, and access them from any device at any time. For example, you can use a document library on a site in Office 365 to store all files related to a specific project or a specific client. Adding files or moving files between folders is as easy as dragging and dropping them from one location to another.
Read more about modern document libraries here.